msm: kgsl: Remove some uneeded debug output

Remove a block of code that dumped the ringbuffer contents after they
were extracted.  The dump is no longer needed and the longer we
stick around dumping things to the console with the mutexes locked,
the better the chance that the watchdog will come bite us.

Change-Id: Ic0dedbadd22993f0f1646841f481cdc6713d38e8
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>