Revert "Conditionally pass kernel version to build.prop"

This reverts commit 036d9e6744f312afde1f4eb68f38747df27cf5f8.

Reason for revert: DroidMonitor: Potential culprit for b/356297315 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I58f1e43978eb812004d2e46fa7ce402e164d2800
diff --git a/android/build_prop.go b/android/build_prop.go
index 14e5e23..80bbfc1 100644
--- a/android/build_prop.go
+++ b/android/build_prop.go
@@ -121,12 +121,7 @@
 		postProcessCmd.Flag("--allow-dup")
 	}
 	postProcessCmd.FlagWithArg("--sdk-version ", config.PlatformSdkVersion().String())
-	if ctx.Config().EnableUffdGc() == "default" {
-		postProcessCmd.FlagWithInput("--kernel-version-file-for-uffd-gc ", PathForOutput(ctx, "dexpreopt/kernel_version_for_uffd_gc.txt"))
-	} else {
-		// still need to pass an empty string to kernel-version-file-for-uffd-gc
-		postProcessCmd.FlagWithArg("--kernel-version-file-for-uffd-gc ", `""`)
-	}
+	postProcessCmd.FlagWithInput("--kernel-version-file-for-uffd-gc ", PathForOutput(ctx, "dexpreopt/kernel_version_for_uffd_gc.txt"))
 	postProcessCmd.Text(p.outputFilePath.String())
 	postProcessCmd.Flags(p.properties.Block_list)
 
diff --git a/android/config.go b/android/config.go
index 5f2307c..92aae7e 100644
--- a/android/config.go
+++ b/android/config.go
@@ -2081,7 +2081,3 @@
 func (c *config) SystemPropFiles(ctx PathContext) Paths {
 	return PathsForSource(ctx, c.productVariables.SystemPropFiles)
 }
-
-func (c *config) EnableUffdGc() string {
-	return String(c.productVariables.EnableUffdGc)
-}
diff --git a/android/variable.go b/android/variable.go
index 2abe80b..5356e85 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -508,8 +508,6 @@
 	ArtTargetIncludeDebugBuild *bool `json:",omitempty"`
 
 	SystemPropFiles []string `json:",omitempty"`
-
-	EnableUffdGc *string `json:",omitempty"`
 }
 
 type PartitionQualifiedVariablesType struct {