db [nfc]: Remove handwritten copy of copyWithCompanion

This has been addressed in Greg's upstream PR:
  simolus3/drift#3022

which was pulled in by the Drift upgrade in 8b564e4 (#1117).

Signed-off-by: Zixuan James Li <zixuan@zulip.com>

Author: PIG208

lib/model/database.dart

@@ -39,31 +39,13 @@ class Accounts extends Table {
 
   Column<String> get ackedPushToken => text().nullable()();
 
-  // If adding a column, be sure to add it to copyWithCompanion too.
-
   @override
   List<Set<Column<Object>>> get uniqueKeys => [
     {realmUrl, userId},
     {realmUrl, email},
   ];
 }
 
-extension AccountExtension on Account {
-  Account copyWithCompanion(AccountsCompanion data) { // TODO(drift): generate this
-    return Account(
-      id: data.id.present ? data.id.value : id,
-      realmUrl: data.realmUrl.present ? data.realmUrl.value : realmUrl,
-      userId: data.userId.present ? data.userId.value : userId,
-      email: data.email.present ? data.email.value : email,
-      apiKey: data.apiKey.present ? data.apiKey.value : apiKey,
-      zulipVersion: data.zulipVersion.present ? data.zulipVersion.value : zulipVersion,
-      zulipMergeBase: data.zulipMergeBase.present ? data.zulipMergeBase.value : zulipMergeBase,
-      zulipFeatureLevel: data.zulipFeatureLevel.present ? data.zulipFeatureLevel.value : zulipFeatureLevel,
-      ackedPushToken: data.ackedPushToken.present ? data.ackedPushToken.value : ackedPushToken,
-    );
-  }
-}
-
 class UriConverter extends TypeConverter<Uri, String> {
   const UriConverter();
   @override String toSql(Uri value) => value.toString();