Remove -Wno-format-pedantic cflag

This is no longer needed.

Test: presubmit
Bug: 20148343
Change-Id: Ie377b3cd183ae89bc159c3b31c64960bce3bc753
diff --git a/cc/config/clang.go b/cc/config/clang.go
index 3636ae9..e59aa37 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -115,10 +115,6 @@
 		// TODO: can we remove this now?
 		"-Wno-reserved-id-macro",
 
-		// Disable overly aggressive warning for format strings.
-		// Bug: 20148343
-		"-Wno-format-pedantic",
-
 		// Workaround for ccache with clang.
 		// See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
 		"-Wno-unused-command-line-argument",