Remove NP_GLContext since it is unsupported
<rdar://problem/36875555>
Created attachment 334938 [details] Patch
Attachment 334938 [details] did not pass style-queue: ERROR: Source/WebCore/plugins/npapi.h:0: No copyright message found. You should have a line: "Copyright [year] <Copyright Owner>" [legal/copyright] [5] ERROR: Source/WebCore/plugins/npapi.h:287: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] Total errors found: 2 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style.
Committed r229194: <https://trac.webkit.org/changeset/229194>