Removing coercion.future.

This test last failed on Aug 29.
I believe the improved behavior is due to Vass's coercion wrapper elimination. (#250)
Remove types/records/sungeun/recordWithRefCopyFns.future.

This test has been passing for at least a week in all configurations that test it.
I don't have any theories on why.
Remove test/functions/iterators/claridge/recursiveIterTypeBug.future.

This test last failed on Aug 28.
The improved behavior may be due to #250.
Removed test/functions/diten/test_promote_var_fn.future

This test last failed on 2014/08/28.
Most likely healed due to #250.
Removed test/types/records/sungeun/chapelTypes/record_range.future.

This test works even after merging #168.
I think it should actually fail, but we can deal with that problem when it resurfaces.
Merge pull request #287 from hildeth/silenceSomeFutures

Silence some futures that have recently started passing.

Most of these appear to be due to Vass's removal of coercion wrappers (#250).
I had record_range as a semantic future, but since it passes for now we may as well silence it. The issue will resurface if it is important.

[Not reviewed]