Revert of Implement the NackModule as part of the new jitter buffer. (patchset #19 id:360001 of https://codereview.webrtc.org/1715673002/ )

Reason for revert:
Unfortunately this breaks in the main waterfall: https://build.chromium.org/p/client.webrtc/builders/Android32%20Builder/builds/6362

I think it's related to dcheck_always_on=1 which is set in GYP_DEFINES only on the trybots, but not on the bots in the main waterfall.

Original issue's description:
> Implement the NackModule as part of the new jitter buffer.
>
> Things done/implemented in this CL:
>   - An interface that can send Nack (VCMNackSender).
>   - An interface that can request KeyFrames (VCMKeyFrameRequestSender).
>   - The nack module (NackModule).
>   - A set of convenience functions for modular numbers (mod_ops.h).
>
> BUG=webrtc:5514
>
> Committed: https://crrev.com/f472c5b6722dfb221f929fc4d3a2b4ca54647701
> Cr-Commit-Position: refs/heads/master@{#11882}

TBR=sprang@webrtc.org,stefan@webrtc.org,terelius@webrtc.org,torbjorng@webrtc.org,perkj@webrtc.org,tommi@webrtc.org,philipel@webrtc.org
BUG=webrtc:5514
NOTRY=True

Review URL: https://codereview.webrtc.org/1771883002

Cr-Commit-Position: refs/heads/master@{#11887}

webrtc/modules/video_coding/video_coding.gypi

@@ -36,7 +36,6 @@
         'frame_buffer.h',
         'generic_decoder.h',
         'generic_encoder.h',
-        'histogram.h',
         'inter_frame_delay.h',
         'internal_defines.h',
         'jitter_buffer.h',
@@ -45,7 +44,6 @@
         'media_opt_util.h',
         'media_optimization.h',
         'nack_fec_tables.h',
-        'nack_module.h',
         'packet.h',
         'qm_select_data.h',
         'qm_select.h',
@@ -67,12 +65,10 @@
         'generic_decoder.cc',
         'generic_encoder.cc',
         'inter_frame_delay.cc',
-        'histogram.cc',
         'jitter_buffer.cc',
         'jitter_estimator.cc',
         'media_opt_util.cc',
         'media_optimization.cc',
-        'nack_module.cc',
         'packet.cc',
         'qm_select.cc',
         'receiver.cc',