Windows Builder Disabled

[Matthew Pickering]

I have disabled the windows builder as it is consistently failing with
the same error message.

>From this log for example:
https://phabricator.haskell.org/harbormaster/build/14430/

ghc.exe: getMBlocks: VirtualAlloc MEM_COMMIT failed: The paging file
is too small for this operation to complete.
764ghc.exe: failed to create OS thread: The paging file is too small
for this operation to complete.

Do you have any ideas Ben/Tamar? I can't see any recent commits which
would have caused this failure.

Matt