The type assertion of DefaultableModule as Module is redundant
Test: m nothing
Bug: n/a

Change-Id: I5f7eea47a2f2bc81a0a5b9314e6a452c38226067
diff --git a/android/defaults.go b/android/defaults.go
index 9046002..d2b351d 100644
--- a/android/defaults.go
+++ b/android/defaults.go
@@ -89,10 +89,10 @@
 var _ Defaultable = (*DefaultableModuleBase)(nil)
 
 func InitDefaultableModule(module DefaultableModule) {
-	if module.(Module).base().module == nil {
+	if module.base().module == nil {
 		panic("InitAndroidModule must be called before InitDefaultableModule")
 	}
-	module.setProperties(module.(Module).GetProperties(), module.(Module).base().variableProperties)
+	module.setProperties(module.GetProperties(), module.base().variableProperties)
 
 	module.AddProperties(module.defaults())