Remove fsc

[scabug]

fsc has never worked as reliable as intended, and better replacements exist now.

With IntelliJ migrating to SBT, the last big user of fsc is gone.

Let's get rid of it.

Some information about this should probably be added to the release notes.

Mailing list: https://groups.google.com/d/topic/scala-internals/ZySmXGE_-e4/discussion

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-7633?orig=1
Reporter: @soc
Affected Versions: 2.11.0-M3

[scabug]

@paulp said:
As buggy as fsc is, I'm not aware of any replacement which does what fsc does, which is "be fast". There's no doubt in my mind people use fsc and would be dissatisfied with the existing alternatives.

[scabug]

@soc said:
See scala/scala#2702.

[SethTisue]

anyone want to say whether this could go forward now...?