Delete RtcEventLogFactory factory as now unused

Bug: webrtc:10206, webrtc:10284
Change-Id: I34fa780f566b52e375ec625bf0d5d02c505d9912
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/143782
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28400}
diff --git a/video/BUILD.gn b/video/BUILD.gn
index ea09c16..8ecdd98 100644
--- a/video/BUILD.gn
+++ b/video/BUILD.gn
@@ -256,6 +256,7 @@
       "../api:rtc_event_log_output_file",
       "../api:test_dependency_factory",
       "../api:video_quality_test_fixture_api",
+      "../api/rtc_event_log:rtc_event_log_factory",
       "../api/task_queue",
       "../api/task_queue:default_task_queue_factory",
       "../api/video:builtin_video_bitrate_allocator_factory",
@@ -267,7 +268,6 @@
       "../call:simulated_network",
       "../common_video",
       "../logging:rtc_event_log_api",
-      "../logging:rtc_event_log_impl_base",
       "../media:rtc_audio_video",
       "../media:rtc_encoder_simulcast_proxy",
       "../media:rtc_internal_video_codecs",