plugins: refactor DI extension IDs

Co-authored-by: Camila Belo <camilaibs@gmail.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/stack-overflow/src/alpha.tsx

@@ -33,7 +33,6 @@ const StackOverflowApi = createApiExtension({
 
 /** @alpha */
 const StackOverflowSearchResultListItem = createSearchResultListItemExtension({
-  id: 'stack-overflow',
   predicate: result => result.type === 'stack-overflow',
   component: () =>
     import('./search/StackOverflowSearchResultListItem').then(