Revert "Auto merge of rust-lang#57975 - alexcrichton:debug-exit-appveyor, r=pietroalbini"

This reverts commit d3d0bf0, reversing
changes made to 40e6a0b.

Author: pietroalbini

src/ci/run.sh

@@ -121,14 +121,7 @@ fi
 travis_fold end log-system-info
 
 if [ ! -z "$SCRIPT" ]; then
-  # This `set +e` followed by capturing the return value is a temporary measure
-  # to help debug "error with exit 259" on AppVeyor temporarily, otherwise all
-  # that's needed here is the `sh`
-  set +e
   sh -x -c "$SCRIPT"
-  ret=$?
-  echo "script exited with $ret"
-  exit $ret
 else
   do_make() {
     travis_fold start "make-$1"