Revert Ping/Pong events.

[bgrozev]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.72%. Comparing base (e4f133c) to head (5a93590).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #226      +/-   ##
============================================
- Coverage     34.02%   33.72%   -0.30%     
  Complexity      162      162              
============================================
  Files            36       36              
  Lines          1358     1352       -6     
  Branches        136      136              
============================================
- Hits            462      456       -6     
  Misses          863      863              
  Partials         33       33              

Files with missing lines	Coverage Δ
...n/src/main/kotlin/org/jitsi/mediajson/MediaJson.kt	100.00% <ø> (ø)

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