tst_QProcess: remove duplicate DisableCrashLogger variable

Amends 90bc0ad41f.

Change-Id: I3faad81a5748ed0942d4fffd93c82124fc18b751
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 08cd38078e11988530251240096b3686e26dd783)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit c88a8c78bdcd8c763fb7d264af884cf91024415c)

tests/auto/corelib/io/qprocess/tst_qprocess.cpp

@@ -1677,9 +1677,6 @@ void tst_QProcess::terminateInChildProcessModifier()
     QFETCH(QProcess::ExitStatus, exitStatus);
     QFETCH(bool, stderrIsEmpty);
 
-    // temporarily disable QTest's crash logger
-    DisableCrashLogger disableCrashLogging;
-
     // testForwardingHelper prints to both stdout and stderr, so if we fail to
     // fail we should be able to tell too
     QProcess process;