Remove ANDROID_EXPERIMENTAL_MTE.

Now that the feature guarded by this flag has landed in Linux 5.10
we no longer need the flag, so we can remove it.

Bug: 135772972
Change-Id: I02fa50848cbd0486c23c8a229bb8f1ab5dd5a56f
diff --git a/Android.bp b/Android.bp
index 9ce5fc7..01cfc67 100644
--- a/Android.bp
+++ b/Android.bp
@@ -14,19 +14,9 @@
         android: {
             static_libs: ["libasync_safe"],
             header_libs: ["bionic_libc_platform_headers"],
-            product_variables: {
-                experimental_mte: {
-                    cflags: ["-DANDROID_EXPERIMENTAL_MTE"],
-                },
-            },
         },
         linux_bionic: {
             header_libs: ["bionic_libc_platform_headers"],
-            product_variables: {
-                experimental_mte: {
-                    cflags: ["-DANDROID_EXPERIMENTAL_MTE"],
-                },
-            },
         },
         host: {
             shared_libs: ["liblog"],