Remove unused binding.h include in //content

This CL cleans up unnecessary binding.h includes
in //content.

Bug: 955171
Change-Id: I20968eecb210e0f60d0ac0d89db28d6cbbbf92c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1959194Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Cr-Commit-Position: refs/heads/master@{#723628}

content/browser/media/session/media_session_impl_unittest.cc

@@ -18,7 +18,6 @@
 #include "content/public/test/test_renderer_host.h"
 #include "content/test/test_web_contents.h"
 #include "media/base/media_content_type.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "services/media_session/public/cpp/features.h"
 #include "services/media_session/public/cpp/test/audio_focus_test_util.h"

content/browser/payments/payment_app_database.h

@@ -17,7 +17,6 @@
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/stored_payment_app.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "third_party/blink/public/common/service_worker/service_worker_status_code.h"
 #include "third_party/blink/public/mojom/payments/payment_app.mojom.h"
 

content/browser/renderer_host/web_database_host_impl.h

@@ -11,7 +11,6 @@
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
 #include "mojo/public/cpp/bindings/remote.h"
 #include "storage/browser/database/database_tracker.h"

content/browser/web_package/signed_exchange_prefetch_handler.h

@@ -12,7 +12,6 @@
 #include "base/optional.h"
 #include "base/time/time.h"
 #include "base/unguessable_token.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
 #include "mojo/public/cpp/bindings/pending_remote.h"
 #include "mojo/public/cpp/bindings/receiver.h"

content/renderer/discardable_memory_utils.h

@@ -21,7 +21,6 @@
 #include "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
 #include "content/common/content_export.h"
 #include "mojo/public/cpp/bindings/associated_binding.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/remote.h"
 #include "mojo/public/cpp/bindings/thread_safe_interface_ptr.h"