common/dump: don't replace pids arbitrarily

common/dump: don't replace pids arbitrarily

In the next patch we'll run tests in a pid namespace, which means that
the test process will have a very low pid.  This low pid situation
causes problems with the dump tests because they unconditionally replace
it with the word "PID", which causes unnecessary test failures.

Initially I was going to fix it by bracketing the regexp with a
whitespace/punctuation/eol/sol detector, but then I decided to remove it
see how many sheep came barreling through.  None did, so I removed it
entirely.  The commit adding it (linked below) was not insightful at
all.

Fixes: 19beb54c96e363 ("Extra filtering as part of IRIX/Linux xfstests reconciliation for dump.")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>