Remove clang: true

clang is the default compiler since Android nougat

Change-Id: I2e737d2c0a2fdc062d0f967244b962c4901b411c
Signed-off-by: Lennart Wieboldt <lennart.1997@gmx.de>
diff --git a/Android.bp b/Android.bp
index c82ac88..dedb73a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -3,7 +3,6 @@
     defaults: [
         "llvm-defaults",
     ],
-    clang: true,
 
     header_libs: ["clang-headers"],