Revert "xfstests: optionally run all tests under quota"

Revert "xfstests: optionally run all tests under quota"

Signed-off-by: Rich Johnston <rjohnston@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This reverts commit edd6bcf9c478036df9056df05924f791a0d322dd which caused
the following tests to fail:

142.out.bad:Can't initialize the DMAPI
143.out.bad:Can't initialize the DMAPI
144.out.bad:Can't initialize the DMAPI
145.out.bad:Can't initialize the DMAPI
146.out.bad:Can't initialize the DMAPI
147.out.bad:Can't initialize the DMAPI
150.out.bad:Can't initialize the DMAPI
155.out.bad:Can't initialize the DMAPI
156.out.bad:Can't initialize the DMAPI
157.out.bad:Can't initialize the DMAPI
158.out.bad:Can't initialize the DMAPI
161.out.bad:Can't initialize the DMAPI
168.out.bad:Can't initialize the DMAPI
175.out.bad:Can't initialize the DMAPI
176.out.bad:Can't initialize the DMAPI
185.out.bad:Can't initialize the DMAPI