common/pkg/cgroups.AvailableControllers: cleanup and inline

Ref: containers#417 (comment)

Signed-off-by: Lokesh Mandvekar <[email protected]>

Author: lsm5

common/pkg/cgroups/cgroups_linux.go

@@ -74,8 +74,8 @@ func init() {
 	}
 }
 
-// getAvailableControllers get the available controllers.
-func getAvailableControllers() ([]string, error) {
+// AvailableControllers get string:bool map of all the available controllers.
+func AvailableControllers() ([]string, error) {
 	controllers := []string{}
 	controllersFile := filepath.Join(cgroupRoot, "cgroup.controllers")
 
@@ -99,11 +99,6 @@ func getAvailableControllers() ([]string, error) {
 	return controllers, nil
 }
 
-// AvailableControllers get string:bool map of all the available controllers.
-func AvailableControllers(exclude map[string]controllerHandler) ([]string, error) {
-	return getAvailableControllers()
-}
-
 func getCgroupPathForCurrentProcess() (string, error) {
 	path := fmt.Sprintf("/proc/%d/cgroup", os.Getpid())
 	f, err := os.Open(path)