Revert of VCMCodecTimer: Change filter from max to 95th percentile (patchset #5 id:180001 of https://codereview.webrtc.org/1742323002/ )

Reason for revert:
Caused unexpected perf stats changes, see http://crbug/594575.

Original issue's description:
> VCMCodecTimer: Change filter from max to 95th percentile
>
> The purpose with this change is to make the filter more robust against anomalies. googMaxDecodeMs is expected to drop a litte by this.
>
> BUG=b/27306053
>
> Committed: https://crrev.com/4bf0c717740d1834e810ea5f32b3c4306c64235f
> Cr-Commit-Position: refs/heads/master@{#11952}

TBR=stefan@webrtc.org,philipel@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=594575,b/27306053

Review URL: https://codereview.webrtc.org/1808693002

Cr-Commit-Position: refs/heads/master@{#12018}

webrtc/modules/video_coding/video_coding.gypi

@@ -47,7 +47,6 @@
         'nack_fec_tables.h',
         'nack_module.h',
         'packet.h',
-        'percentile_filter.h',
         'qm_select_data.h',
         'qm_select.h',
         'receiver.h',
@@ -75,7 +74,6 @@
         'media_optimization.cc',
         'nack_module.cc',
         'packet.cc',
-        'percentile_filter.cc',
         'qm_select.cc',
         'receiver.cc',
         'rtt_filter.cc',