Remove unused variable in assembler test.

This is flagged as an error when building master, but not others...

Change-Id: Iaea5307b06d8e4fa1a9d1035905fc204eb98559a
diff --git a/compiler/utils/assembler_thumb_test.cc b/compiler/utils/assembler_thumb_test.cc
index f46e872..55fbed1 100644
--- a/compiler/utils/assembler_thumb_test.cc
+++ b/compiler/utils/assembler_thumb_test.cc
@@ -27,7 +27,9 @@
 // Include results file (generated manually)
 #include "assembler_thumb_test_expected.cc.inc"
 
+#ifndef HAVE_ANDROID_OS
 static constexpr bool kPrintResults = false;
+#endif
 
 void SetAndroidData() {
   const char* data = getenv("ANDROID_DATA");