modules/video_coding/utility: Remove include

This makes it clearer this code not meant to be used as an API.
I could not find any use of this in downstream code.

BUG=webrtc:5095
TESTED=git cl try -c --bot=android_compile_rel --bot=linux_compile_rel --bot=win_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc
R=stefan@webrtc.org
TBR=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1440873005 .

Cr-Commit-Position: refs/heads/master@{#10699}
diff --git a/webrtc/modules/video_coding/utility/qp_parser.cc b/webrtc/modules/video_coding/utility/qp_parser.cc
index 62ce313..0916cb0 100644
--- a/webrtc/modules/video_coding/utility/qp_parser.cc
+++ b/webrtc/modules/video_coding/utility/qp_parser.cc
@@ -8,10 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/modules/video_coding/utility/include/qp_parser.h"
+#include "webrtc/modules/video_coding/utility/qp_parser.h"
 
 #include "webrtc/common_types.h"
-#include "webrtc/modules/video_coding/utility/include/vp8_header_parser.h"
+#include "webrtc/modules/video_coding/utility/vp8_header_parser.h"
 
 namespace webrtc {