C++17 is the default now.

Test: builds
Change-Id: Iaaa606865539ed646d6eee07195d64e3bae9b09c
diff --git a/Android.bp b/Android.bp
index 96b2e8c..b0f9456 100644
--- a/Android.bp
+++ b/Android.bp
@@ -16,7 +16,6 @@
     name: "libgtest_isolated",
     host_supported: true,
     cflags: ["-Wall", "-Werror"],
-    cpp_std: "c++17",
     export_include_dirs: ["include"],
 
     srcs: [