Always turn on compatible property

It's mandatory for devices launching with Android P or later.

Bug: 170082975
Test: m
Change-Id: I22578c3b77d28abc8a09b88324ef3702d0ccafde
diff --git a/android/config.go b/android/config.go
index 8df65f7..75e9fd5 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1247,10 +1247,6 @@
 	return c.productVariables.ProductPrivateSepolicyDirs
 }
 
-func (c *config) ProductCompatibleProperty() bool {
-	return Bool(c.productVariables.ProductCompatibleProperty)
-}
-
 func (c *config) MissingUsesLibraries() []string {
 	return c.productVariables.MissingUsesLibraries
 }
diff --git a/android/variable.go b/android/variable.go
index 53f081e..afad568 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -331,7 +331,6 @@
 
 	ProductPublicSepolicyDirs  []string `json:",omitempty"`
 	ProductPrivateSepolicyDirs []string `json:",omitempty"`
-	ProductCompatibleProperty  *bool    `json:",omitempty"`
 
 	ProductVndkVersion *string `json:",omitempty"`