ci: Revert temp hack for desync of Flutter main branch

This reverts commits 9cc34cd and 37af86d (#1691, #1690).

The operational issue in the upstream repo which this worked around
has been fixed.

Author: gnprice

.github/workflows/ci.yml

@@ -27,20 +27,15 @@ jobs:
       #     https://github.com/zulip/zulip-flutter/issues/1710
       #   Pending that, fetch more than 1000 commits.
       run: |
-        # TODO temp hack 2025-07-08 as Flutter's `main` is broken but `master` works:
-        #   https://github.com/zulip/zulip-flutter/pull/1688#issuecomment-3050661097
-        #   https://discord.com/channels/608014603317936148/608021351567065092/1392301750383415376
-        #   https://github.com/flutter/flutter/issues/171833
-        #   (See also "temp hack" items below.)
-        git clone --depth=3000 -b master https://github.com/flutter/flutter ~/flutter
+        git clone --depth=3000 -b main https://github.com/flutter/flutter ~/flutter
         TZ=UTC git --git-dir ~/flutter/.git log -1 --format='%h | %ci | %s' --date=iso8601-local
         echo ~/flutter/bin >> "$GITHUB_PATH"
 
         # The Flutter tool assumes the tip of tree is "origin/master"
         # (or "upstream/master"):
         #   https://github.com/flutter/flutter/issues/160626
         # TODO(upstream): make workaround unneeded
-        # TODO, see temp hack above: git --git-dir ~/flutter/.git update-ref refs/remotes/origin/master origin/main
+        git --git-dir ~/flutter/.git update-ref refs/remotes/origin/master origin/main
 
     - name: Download Flutter SDK artifacts (flutter precache)
       run: flutter precache --universal
@@ -49,5 +44,4 @@ jobs:
       run: flutter pub get
 
     - name: Run tools/check
-      # TODO omitting flutter_version, see temp hack above
-      run: TERM=dumb tools/check --verbose --all-files analyze test build_runner l10n drift pigeon icons android shellcheck
+      run: TERM=dumb tools/check --all --verbose