Improve commenting for cc/builer.go, and kill dead code

Test: m nothing
Change-Id: I836c717d3243e901257120be71246e419de4d28e
diff --git a/cc/strip.go b/cc/strip.go
index e9aec91..1f10a74 100644
--- a/cc/strip.go
+++ b/cc/strip.go
@@ -54,7 +54,7 @@
 func (stripper *Stripper) strip(actx android.ModuleContext, in android.Path, out android.ModuleOutPath,
 	flags StripFlags, isStaticLib bool) {
 	if actx.Darwin() {
-		TransformDarwinStrip(actx, in, out)
+		transformDarwinStrip(actx, in, out)
 	} else {
 		if Bool(stripper.StripProperties.Strip.Keep_symbols) {
 			flags.StripKeepSymbols = true
@@ -68,7 +68,7 @@
 		if actx.Config().Debuggable() && !flags.StripKeepMiniDebugInfo && !isStaticLib {
 			flags.StripAddGnuDebuglink = true
 		}
-		TransformStrip(actx, in, out, flags)
+		transformStrip(actx, in, out, flags)
 	}
 }