Removing clang_cflags to check if they're even necessary

Test: Treehugger & ran mma
Bug: 226636335

Change-Id: I158862fd23ad7050bde0916f24e12934b95f7646
diff --git a/tests/Android.bp b/tests/Android.bp
index 6239748..6a41cf2 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -641,9 +641,6 @@
     ],
     tidy: false,
     target: {
-        host: {
-            cflags: ["-D__clang__"],
-        },
         musl: {
             // Musl doesn't have fortify
             enabled: false,