[webrtc-pc] Fix respec warnings surfaced by 20.0.4

Orphis has just created a new issue for https://github.com/w3c/webrtc-pc:

== Fix respec warnings surfaced by 20.0.4 ==
New version of respec fixed the exception throw while parsing the spec, but surfaced some warnings:
```
No <dfn> for interface RTCErrorEvent. More info.
Found linkless element with text 'close' but no matching <dfn>.
Found linkless element with text 'close' but no matching <dfn>.
Found linkless element with text 'close' but no matching <dfn>.
```

Please view or discuss this issue at https://github.com/w3c/webrtc-pc/issues/1798 using your GitHub account

Received on Monday, 12 March 2018 15:15:29 UTC