webview: remove unnecessary include

AFAICT this class doesn't depend upon AwContents.

BUG=none
TEST=none

Change-Id: I0a0427986e71e31625d58aaa6b6c6840597d1ac2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2232762
Auto-Submit: Scott Violet <sky@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Reviewed-by: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775760}

android_webview/browser/js_java_interaction/js_to_java_messaging.cc

@@ -4,7 +4,6 @@
 
 #include "android_webview/browser/js_java_interaction/js_to_java_messaging.h"
 
-#include "android_webview/browser/aw_contents.h"
 #include "android_webview/browser_jni_headers/WebMessageListenerHolder_jni.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"