Revert "Track allowed transitive deps in any updatable module."

Revert submission 1312796-apex-allowed-deps

Reason for revert: b/161974327
Reverted Changes:
I52a4be72e:Add a check for apex/allowed_deps.txt to droidcore...
I56771ba3f:Track allowed transitive deps in any updatable mod...

Change-Id: I3be0a1b0dd824dafeadb485daca8e58b81a3ec5c
diff --git a/android/apex.go b/android/apex.go
index 3437fed..47f07ca 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -450,15 +450,15 @@
 	var fullContent strings.Builder
 	var flatContent strings.Builder
 
-	fmt.Fprintf(&fullContent, "%s(minSdkVersion:%s):\\n", ctx.ModuleName(), minSdkVersion)
+	fmt.Fprintf(&flatContent, "%s(minSdkVersion:%s):\\n", ctx.ModuleName(), minSdkVersion)
 	for _, key := range FirstUniqueStrings(SortedStringKeys(depInfos)) {
 		info := depInfos[key]
 		toName := fmt.Sprintf("%s(minSdkVersion:%s)", info.To, info.MinSdkVersion)
 		if info.IsExternal {
 			toName = toName + " (external)"
 		}
-		fmt.Fprintf(&fullContent, "  %s <- %s\\n", toName, strings.Join(SortedUniqueStrings(info.From), ", "))
-		fmt.Fprintf(&flatContent, "%s\\n", toName)
+		fmt.Fprintf(&fullContent, "%s <- %s\\n", toName, strings.Join(SortedUniqueStrings(info.From), ", "))
+		fmt.Fprintf(&flatContent, "  %s\\n", toName)
 	}
 
 	d.fullListPath = PathForModuleOut(ctx, "depsinfo", "fulllist.txt").OutputPath