Delete deprecated member CodecSpecificInfoVP9::end_of_picture

This field is unused. It was deprecated in
https://webrtc-review.googlesource.com/c/src/+/192542

Bug: None
Change-Id: Iba264c03e16fc240893595075b525d44efa8ab96
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/314720
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Auto-Submit: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Åsa Persson <asapersson@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40504}
diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index d8d20d6..738d3d4 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -299,10 +299,7 @@
     "../../common_video/generic_frame_descriptor",
     "../../rtc_base/system:rtc_export",
   ]
-  absl_deps = [
-    "//third_party/abseil-cpp/absl/base:core_headers",
-    "//third_party/abseil-cpp/absl/types:optional",
-  ]
+  absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
 }
 
 rtc_library("video_coding_legacy") {
diff --git a/modules/video_coding/include/video_codec_interface.h b/modules/video_coding/include/video_codec_interface.h
index 46ae0d2..c6522fc 100644
--- a/modules/video_coding/include/video_codec_interface.h
+++ b/modules/video_coding/include/video_codec_interface.h
@@ -13,7 +13,6 @@
 
 #include <vector>
 
-#include "absl/base/attributes.h"
 #include "absl/types/optional.h"
 #include "api/video/video_frame.h"
 #include "api/video_codecs/scalability_mode.h"
@@ -79,8 +78,6 @@
   // Frame reference data.
   uint8_t num_ref_pics;
   uint8_t p_diff[kMaxVp9RefPics];
-
-  ABSL_DEPRECATED("") bool end_of_picture;
 };
 static_assert(std::is_pod<CodecSpecificInfoVP9>::value, "");