Remove deprecated models and mobx usage (react-query refactor) (#1934)

* Update login page to use service query

* Update modal to use session instead of store

* Move image sizes cache off store

* Update settings to no longer use store

* Update link-meta fetch to use agent instead of rootstore

* Remove deprecated resolveName()

* Delete deprecated link-metas cache

* Delete deprecated posts cache

* Delete all remaining mobx models, including the root store

* Strip out unused mobx observer wrappers

src/view/com/posts/FeedSlice.tsx

@@ -1,6 +1,5 @@
 import React from 'react'
 import {StyleSheet, View} from 'react-native'
-import {observer} from 'mobx-react-lite'
 import {FeedPostSlice} from '#/state/queries/post-feed'
 import {AtUri, moderatePost, ModerationOpts} from '@atproto/api'
 import {Link} from '../util/Link'
@@ -10,7 +9,7 @@ import {FeedItem} from './FeedItem'
 import {usePalette} from 'lib/hooks/usePalette'
 import {makeProfileLink} from 'lib/routes/links'
 
-export const FeedSlice = observer(function FeedSliceImpl({
+export function FeedSlice({
   slice,
   dataUpdatedAt,
   ignoreFilterFor,
@@ -94,7 +93,7 @@ export const FeedSlice = observer(function FeedSliceImpl({
       ))}
     </>
   )
-})
+}
 
 function ViewFullThread({slice}: {slice: FeedPostSlice}) {
   const pal = usePalette('default')