Revert "Update clang version to clang-r468909"

This reverts commit 395e50544ffe4dd528c0289030881e6eafb17d54.

Bug: 241941550
Bug: 241601211
Bug: 241011085
Test: Builds

Change-Id: Ic2bb5d5dc52db743435defd129b5c2d0dc794d58
diff --git a/cc/config/global.go b/cc/config/global.go
index bf80907..a7701b9 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -244,10 +244,6 @@
 		"-Wno-error=unused-but-set-parameter", // http://b/197240255
 		// New warnings to be fixed after clang-r458507
 		"-Wno-error=unqualified-std-cast-call", // http://b/239662094
-		// New warnings to be fixed after clang-r468909
-		"-Wno-error=array-parameter",     // http://b/241941550
-		"-Wno-error=deprecated-builtins", // http://b/241601211
-		"-Wno-error=deprecated",          // in external/googletest/googletest
 	}
 
 	noOverrideExternalGlobalCflags = []string{
@@ -312,8 +308,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r468909"
-	ClangDefaultShortVersion = "15.0.2"
+	ClangDefaultVersion      = "clang-r458507"
+	ClangDefaultShortVersion = "15.0.1"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{