Delete reference to "no_build_hooks" GN variable.

It's a no-op and I'm going to remove it.

Bug: chromium:40114668
Change-Id: I165cf0132ef3f7505c8ffb0ab0611e644acbe6f3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374380
Reviewed-by: Jeremy Leconte <jleconte@webrtc.org>
Auto-Submit: Andrew Grieve <agrieve@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43748}

sdk/android/BUILD.gn

@@ -33,7 +33,6 @@ if (is_android) {
     direct_deps_only = true
     use_unprocessed_jars = true
     requires_android = true
-    no_build_hooks = true
 
     deps = [
       ":audio_api_java",