Remove gwp_asan_headers from libc_defaults

This turns out to over-export GWP-ASan headers to apexes. This is
unnecessary, GWP-ASan headers should only be referenced by libc
internally and debuggerd.

Test: m
Bug: N/A
Change-Id: I04bb8ceb094e681366a4931185906e67ce420c17

libc/Android.bp

diff --git a/libc/Android.bp b/libc/Android.bp
index 3a8948b..9c2e13e 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -95,7 +95,6 @@
 
     header_libs: [
         "libc_headers",
-        "gwp_asan_headers",
         "liblog_headers",  // needed by bionic/libc/async_safe/include
     ],
     export_header_lib_headers: [