Remove unneeded -Wno-constant-logical-operand flag

Test: m checkbuild
Change-Id: If1ec62b6d88b8260c9ec39e0d63a379e7ae573e9
diff --git a/cc/config/clang.go b/cc/config/clang.go
index 46d8528..0b2190c 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -186,9 +186,6 @@
 		// compatibility.
 		"-Wno-c++98-compat-extra-semi",
 
-		// Disable this warning until we can fix all instances where it fails.
-		"-Wno-constant-logical-operand",
-
 		// Disable this warning because we don't care about behavior with older compilers.
 		"-Wno-return-std-move-in-c++11",