Instance normalizer: add default stats, remove default media_attachments

app/soapbox/normalizers/__tests__/instance-test.js

@@ -8,13 +8,7 @@ describe('normalizeInstance()', () => {
       approval_required: false,
       contact_account: {},
       configuration: {
-        media_attachments: {
+        media_attachments: {},
-          image_size_limit: 10485760,
-          image_matrix_limit: 16777216,
-          video_size_limit: 41943040,
-          video_frame_rate_limit: 60,
-          video_matrix_limit: 2304000,
-        },
         polls: {
           max_options: 4,
           max_characters_per_option: 25,
@@ -48,7 +42,11 @@ describe('normalizeInstance()', () => {
       registrations: false,
       rules: [],
       short_description: '',
-      stats: {},
+      stats: {
+        domain_count: 0,
+        status_count: 0,
+        user_count: 0,
+      },
       title: '',
       thumbnail: '',
       uri: '',

app/soapbox/normalizers/instance.js

@@ -13,13 +13,7 @@ const InstanceRecord = ImmutableRecord({
   approval_required: false,
   contact_account: ImmutableMap(),
   configuration: ImmutableMap({
-    media_attachments: ImmutableMap({
+    media_attachments: ImmutableMap(),
-      image_size_limit: 10485760,
-      image_matrix_limit: 16777216,
-      video_size_limit: 41943040,
-      video_frame_rate_limit: 60,
-      video_matrix_limit: 2304000,
-    }),
     polls: ImmutableMap({
       max_options: 4,
       max_characters_per_option: 25,
@@ -53,7 +47,11 @@ const InstanceRecord = ImmutableRecord({
   registrations: false,
   rules: ImmutableList(),
   short_description: '',
-  stats: ImmutableMap(),
+  stats: ImmutableMap({
+    domain_count: 0,
+    status_count: 0,
+    user_count: 0,
+  }),
   title: '',
   thumbnail: '',
   uri: '',