Merge pull request #14712 from jrose-apple/5.0-no-warnings-no-really

[5.0] Revert "[test] Disable ClangImporter/private_frameworks_modules.swift"

Author: xedin

test/ClangImporter/private_frameworks_modules.swift

@@ -1,7 +1,7 @@
 // RUN: %empty-directory(%t)
 
-// RUN: %target-swift-frontend -typecheck -F %S/Inputs/frameworks -DOLD -verify %s -Xcc -Wno-private-module
-// RUN: %target-swift-frontend -typecheck -F %S/Inputs/frameworks -DNEW -verify %s -Xcc -Wno-private-module
+// RUN: %target-swift-frontend -typecheck -F %S/Inputs/frameworks -DOLD -verify %s -Xcc -w
+// RUN: %target-swift-frontend -typecheck -F %S/Inputs/frameworks -DNEW -verify %s -Xcc -w
 
 import PrivateAsSubmodule.Private