Remove the "pkgbuild" step on the bots.

tools/gardening/lib/src/buildbot_data.dart

Index: tools/gardening/lib/src/buildbot_data.dart
diff --git a/tools/gardening/lib/src/buildbot_data.dart b/tools/gardening/lib/src/buildbot_data.dart
index 912b77f4e84b02906359f8a78eadc8b8e6acc3b5..1d67b64e841e89239f4b10336ba0fd9b9e3f2d0e 100644
--- a/tools/gardening/lib/src/buildbot_data.dart
+++ b/tools/gardening/lib/src/buildbot_data.dart
@@ -720,21 +720,18 @@ const List<BuildGroup> buildGroups = const <BuildGroup>[
       ], testSteps: const <String>[
         'package unit tests',
         'third_party/pkg_tested unit tests',
-        'pub get dependencies',
       ]),
       const BuildSubgroup(shardNames: const <String>[
         'pkg-linux-release-be',
       ], testSteps: const <String>[
         'package unit tests',
         'third_party/pkg_tested unit tests',
-        'pub get dependencies',
       ]),
       const BuildSubgroup(shardNames: const <String>[
         'pkg-win7-release-be',
       ], testSteps: const <String>[
         'package unit tests',
         'third_party/pkg_tested unit tests',
-        'pub get dependencies',
       ]),
     ],
   ),