Delete some unused functions.

Test: cc soong tests
Change-Id: Ifa60cdd19aa9151656a6a9df295fe42ec1d8fd46
diff --git a/cc/util.go b/cc/util.go
index b256b9a..4e10037 100644
--- a/cc/util.go
+++ b/cc/util.go
@@ -15,9 +15,7 @@
 package cc
 
 import (
-	"fmt"
 	"path/filepath"
-	"regexp"
 	"strings"
 
 	"android/soong/android"
@@ -30,30 +28,12 @@
 	return android.JoinWithPrefix(dirs.Strings(), "-I")
 }
 
-func ldDirsToFlags(dirs []string) string {
-	return android.JoinWithPrefix(dirs, "-L")
-}
-
-func libNamesToFlags(names []string) string {
-	return android.JoinWithPrefix(names, "-l")
-}
-
 var indexList = android.IndexList
 var inList = android.InList
 var filterList = android.FilterList
 var removeListFromList = android.RemoveListFromList
 var removeFromList = android.RemoveFromList
 
-var libNameRegexp = regexp.MustCompile(`^lib(.*)$`)
-
-func moduleToLibName(module string) (string, error) {
-	matches := libNameRegexp.FindStringSubmatch(module)
-	if matches == nil {
-		return "", fmt.Errorf("Library module name %s does not start with lib", module)
-	}
-	return matches[1], nil
-}
-
 func flagsToBuilderFlags(in Flags) builderFlags {
 	return builderFlags{
 		globalCommonFlags:     strings.Join(in.Global.CommonFlags, " "),
@@ -113,13 +93,6 @@
 	return list
 }
 
-func addSuffix(list []string, suffix string) []string {
-	for i := range list {
-		list[i] = list[i] + suffix
-	}
-	return list
-}
-
 // linkDirOnDevice/linkName -> target
 func makeSymlinkCmd(linkDirOnDevice string, linkName string, target string) string {
 	dir := filepath.Join("$(PRODUCT_OUT)", linkDirOnDevice)