Delete groups (legacy communities system) (#8027)

* Remove deprecated feature_communities_v2_prototypes

* Update _components

* i18n

* delint

* Cut out a bit more dead code

* Carve into legacy components

* Carve into mostly the room list code

* Carve into instances of "groupId"

* Carve out more of what comes up with "groups"

* Carve out some settings

* ignore related groups state

* Remove instances of spacesEnabled

* Fix some obvious issues

* Remove now-unused css

* Fix variable naming for legacy components

* Update i18n

* Misc cleanup from manual review

* Update snapshot for changed flag

* Appease linters

* rethemedex

* Remove now-unused AddressPickerDialog

* Make ConfirmUserActionDialog's member a required prop

* Remove useless override from RightPanelStore

* Remove extraneous CSS

* Update i18n

* Demo: "Communities are now Spaces" landing page

* Restore linkify for group IDs

* Demo: Dialog on click for communities->spaces notice

* i18n for demos

* i18n post-merge

* Update copy

* Appease the linter

* Post-merge cleanup

* Re-add spaces_learn_more_url to the new SdkConfig place

* Round 1 of post-merge fixes

* i18n

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/structures/MessagePanel.tsx

@@ -157,9 +157,6 @@ interface IProps {
     // which layout to use
     layout?: Layout;
 
-    // whether or not to show flair at all
-    enableFlair?: boolean;
-
     resizeNotifier: ResizeNotifier;
     permalinkCreator?: RoomPermalinkCreator;
     editState?: EditorStateTransfer;
@@ -811,7 +808,6 @@ export default class MessagePanel extends React.Component<IProps, IState> {
                 getRelationsForEvent={this.props.getRelationsForEvent}
                 showReactions={this.props.showReactions}
                 layout={this.props.layout}
-                enableFlair={this.props.enableFlair}
                 showReadReceipts={this.props.showReadReceipts}
                 callEventGrouper={callEventGrouper}
                 hideSender={this.state.hideSender}