Remove EnforceRROExemptedTargets

There is no more target relying on EnforceRROExemptedTargets

Bug: 150820813
Test: m
Change-Id: If50d22c0e4f99e8c50d6a30cb94a0c3a5646b6fa
diff --git a/android/variable.go b/android/variable.go
index 76666c5..dd000ad 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -199,11 +199,9 @@
 	CrossHostArch          *string `json:",omitempty"`
 	CrossHostSecondaryArch *string `json:",omitempty"`
 
-	DeviceResourceOverlays  []string `json:",omitempty"`
-	ProductResourceOverlays []string `json:",omitempty"`
-	EnforceRROTargets       []string `json:",omitempty"`
-	// TODO(b/150820813) Some modules depend on static overlay, remove this after eliminating the dependency.
-	EnforceRROExemptedTargets  []string `json:",omitempty"`
+	DeviceResourceOverlays     []string `json:",omitempty"`
+	ProductResourceOverlays    []string `json:",omitempty"`
+	EnforceRROTargets          []string `json:",omitempty"`
 	EnforceRROExcludedOverlays []string `json:",omitempty"`
 
 	AAPTCharacteristics *string  `json:",omitempty"`