Try fix module test (#147934)

Issue

* flutter/flutter#112033

Suggested in flutter/flutter#112033 (comment), and makes the test pass for me locally on the M1 Macbook.

Author: dcharkes

dev/devicelab/bin/tasks/module_test_ios.dart

@@ -564,10 +564,6 @@ end
             '-resultBundlePath',
             resultBundlePath,
             'test',
-            'CODE_SIGNING_ALLOWED=NO',
-            'CODE_SIGNING_REQUIRED=NO',
-            'CODE_SIGN_IDENTITY=-',
-            'EXPANDED_CODE_SIGN_IDENTITY=-',
             'COMPILER_INDEX_STORE_ENABLE=NO',
           ],
           workingDirectory: objectiveCHostApp.path,