Revert "Soong support for namespaces"

This reverts commit 63a250a336a1b910836eeb4caebcf5b4f8d91c2a.

Reason for revert: Some failures:
  namespace_test.go:648: dir1/Blueprints:2:4: a namespace must be the first module in the file 
  such as New Build Breakage: aosp-master/build_test @ 4475274

Change-Id: I1b5db8eb934e51ff22241bfca44199d886b1393b
diff --git a/android/testing.go b/android/testing.go
index 60189d3..03572b3 100644
--- a/android/testing.go
+++ b/android/testing.go
@@ -23,16 +23,9 @@
 )
 
 func NewTestContext() *TestContext {
-	ctx := &TestContext{
+	return &TestContext{
 		Context: blueprint.NewContext(),
 	}
-
-	namespaceExportFilter := func(namespace *Namespace) bool {
-		return true
-	}
-	ctx.SetNameInterface(NewNameResolver(namespaceExportFilter))
-
-	return ctx
 }
 
 func NewTestArchContext() *TestContext {