diff --git a/src/database/update.js b/src/database/update.js
index ab355308..7fc387f5 100644
--- a/src/database/update.js
+++ b/src/database/update.js
@@ -41,19 +41,9 @@ module.exports.checkVersion = function () {
 };
 
 function update(version, cb) {
-    if (version < 3 && hasUpdates.indexOf(2) < 0) {
-        addMetaColumnToLibraries(cb);
-    } else if (version < 4) {
-        Q.allSettled([
-            Q.nfcall(mergeChannelLibraries),
-            Q.nfcall(mergeChannelRanks),
-            Q.nfcall(mergeChannelBans)
-        ]).done(function () {
-            LOGGER.info("Merged channel tables.  Please verify that everything " +
-                              "is working correctly, and then type '/delete_old_tables'" +
-                              " into the CyTube process to remove the unused tables.");
-            cb();
-        })
+    if (version < 4) {
+        LOGGER.error('Cannot auto-upgrade: db_version 4 is too old!');
+        process.exit(1);
     } else if (version < 5) {
         fixUtf8mb4(cb);
     } else if (version < 6) {
@@ -71,172 +61,6 @@ function update(version, cb) {
     }
 }
 
-function addMetaColumnToLibraries(cb) {
-    LOGGER.info("db version indicates channel libraries don't have " +
-                      "meta column.  Updating...");
-    Q.nfcall(db.query, "SHOW TABLES")
-    .then(function (rows) {
-        rows = rows.map(function (r) {
-            return r[Object.keys(r)[0]];
-        }).filter(function (r) {
-            return r.match(/_library$/);
-        });
-
-        var queue = [];
-        rows.forEach(function (table) {
-            queue.push(Q.nfcall(db.query, "ALTER TABLE `" + table + "` ADD meta TEXT")
-                .then(function () {
-                    LOGGER.info("Added meta column to " + table);
-                })
-            );
-        });
-
-        return Q.all(queue);
-    }).catch(function (err) {
-        LOGGER.error("Adding meta column to library tables failed: " + err);
-    }).done(cb);
-}
-
-function mergeChannelLibraries(cb) {
-    Q.nfcall(db.query, "SHOW TABLES")
-    .then(function (rows) {
-        rows = rows.map(function (r) {
-            return r[Object.keys(r)[0]];
-        }).filter(function (r) {
-            return r.match(/chan_(.*)?_library$/);
-        });
-
-        var queue = [];
-        rows.forEach(function (table) {
-            var name = table.match(/chan_(.*?)_library$/)[1];
-            queue.push(Q.nfcall(db.query,
-                "INSERT INTO `channel_libraries` SELECT id, title, seconds, type, meta, ?" +
-                " AS channel FROM `" + table + "`", [name])
-                .then(function () {
-                    LOGGER.info("Copied " + table + " to channel_libraries");
-                }).catch(function (err) {
-                    LOGGER.error("Copying " + table + " to channel_libraries failed: " +
-                        err);
-                    if (err.stack) {
-                        LOGGER.error(err.stack);
-                    }
-                })
-            );
-        });
-
-        return Q.all(queue);
-    }).catch(function (err) {
-        LOGGER.error("Copying libraries to channel_libraries failed: " + err);
-        if (err.stack) {
-            LOGGER.error(err.stack);
-        }
-    }).done(function () { cb(null); });
-}
-
-function mergeChannelRanks(cb) {
-    Q.nfcall(db.query, "SHOW TABLES")
-    .then(function (rows) {
-        rows = rows.map(function (r) {
-            return r[Object.keys(r)[0]];
-        }).filter(function (r) {
-            return r.match(/chan_(.*?)_ranks$/);
-        });
-
-        var queue = [];
-        rows.forEach(function (table) {
-            var name = table.match(/chan_(.*?)_ranks$/)[1];
-            queue.push(Q.nfcall(db.query,
-                "INSERT INTO `channel_ranks` SELECT name, rank, ?" +
-                " AS channel FROM `" + table + "`", [name])
-                .then(function () {
-                    LOGGER.info("Copied " + table + " to channel_ranks");
-                }).catch(function (err) {
-                    LOGGER.error("Copying " + table + " to channel_ranks failed: " +
-                        err);
-                    if (err.stack) {
-                        LOGGER.error(err.stack);
-                    }
-                })
-            );
-        });
-
-        return Q.all(queue);
-    }).catch(function (err) {
-        LOGGER.error("Copying ranks to channel_ranks failed: " + err);
-        if (err.stack) {
-            LOGGER.error(err.stack);
-        }
-    }).done(function () { cb(null); });
-}
-
-function mergeChannelBans(cb) {
-    Q.nfcall(db.query, "SHOW TABLES")
-    .then(function (rows) {
-        rows = rows.map(function (r) {
-            return r[Object.keys(r)[0]];
-        }).filter(function (r) {
-            return r.match(/chan_(.*?)_bans$/);
-        });
-
-        var queue = [];
-        rows.forEach(function (table) {
-            var name = table.match(/chan_(.*?)_bans$/)[1];
-            queue.push(Q.nfcall(db.query,
-                "INSERT INTO `channel_bans` SELECT id, ip, name, bannedby, reason, ?" +
-                " AS channel FROM `" + table + "`", [name])
-                .then(function () {
-                    LOGGER.info("Copied " + table + " to channel_bans");
-                }).catch(function (err) {
-                    LOGGER.error("Copying " + table + " to channel_bans failed: " +
-                        err);
-                    if (err.stack) {
-                        LOGGER.error(err.stack);
-                    }
-                })
-            );
-        });
-
-        return Q.all(queue);
-    }).catch(function (err) {
-        LOGGER.error("Copying ranks to channel_bans failed: " + err);
-        if (err.stack) {
-            LOGGER.error(err.stack);
-        }
-    }).done(function () { cb(null); });
-}
-
-module.exports.deleteOldChannelTables = function (cb) {
-    Q.nfcall(db.query, "SHOW TABLES")
-    .then(function (rows) {
-        rows = rows.map(function (r) {
-            return r[Object.keys(r)[0]];
-        }).filter(function (r) {
-            return r.match(/chan_(.*?)_(library|ranks|bans)$/);
-        });
-
-        var queue = [];
-        rows.forEach(function (table) {
-            queue.push(Q.nfcall(db.query, "DROP TABLE `" + table + "`")
-                .then(function () {
-                    LOGGER.info("Deleted " + table);
-                }).catch(function (err) {
-                    LOGGER.error("Deleting " + table + " failed: " + err);
-                    if (err.stack) {
-                        LOGGER.error(err.stack);
-                    }
-                })
-            );
-        });
-
-        return Q.all(queue);
-    }).catch(function (err) {
-        LOGGER.error("Deleting old tables failed: " + err);
-        if (err.stack) {
-            LOGGER.error(err.stack);
-        }
-    }).done(cb);
-};
-
 function fixUtf8mb4(cb) {
     var queries = [
         "ALTER TABLE `users` MODIFY `profile` TEXT CHARACTER SET utf8mb4 NOT NULL",
diff --git a/src/main.js b/src/main.js
index 85d49c37..cbd08e78 100644
--- a/src/main.js
+++ b/src/main.js
@@ -28,19 +28,6 @@ function handleLine(line) {
     if (line === '/reload') {
         LOGGER.info('Reloading config');
         Config.load('config.yaml');
-    } else if (line === '/gc') {
-        if (global && global.gc) {
-            LOGGER.info('Running GC');
-            global.gc();
-        } else {
-            LOGGER.info('Failed to invoke GC: node started without --expose-gc');
-        }
-    } else if (line === '/delete_old_tables') {
-        require('./database/update').deleteOldChannelTables(function (err) {
-            if (!err) {
-                LOGGER.info('Deleted old channel tables');
-            }
-        });
     } else if (line.indexOf('/switch') === 0) {
         const args = line.split(' ');
         args.shift();