scripts: Remove call to switch_to_strict_mode

My change in https://gerrit.chromium.org/gerrit/19795 had removed the "set
-e", but https://gerrit.chromium.org/gerrit/17225 re-enabled it --
presumably because that was originally written when the "set -e" was still
there.  The strict mode causes the script to exit when sym_upload fails
(which is often).

BUG=chromium-os:30878
TEST=Basic run of script

Change-Id: I2398341505eb9e375f5cb9e008d6c342e4f3b072
Reviewed-on: https://gerrit.chromium.org/gerrit/22617
Commit-Ready: Michael Krebs <mkrebs@chromium.org>
Tested-by: Michael Krebs <mkrebs@chromium.org>
Reviewed-by: Brian Harring <ferringb@chromium.org>
diff --git a/upload_symbols b/upload_symbols
index 4ab0ec4..038cfa6 100755
--- a/upload_symbols
+++ b/upload_symbols
@@ -185,8 +185,6 @@
     MAX_TOTAL_ERRORS_FOR_RETRY=${TEST_MAX_TOTAL_ERRORS_FOR_RETRY}
   fi
 
-  switch_to_strict_mode
-
   [ -n "$FLAGS_board" ] || die_notrace "--board is required."
 
   SYSROOT="/build/${FLAGS_board}"