chore: remove debug output from run_acir_tests script (#1970)

This snuck in in the
AztecProtocol/aztec-packages@0036e07
PR.

`-x` allows one to print the command before executing it, so its good
for debugging, but when running tests it becomes verbose for the CI

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [ ] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [ ] Every change is related to the PR description.
- [ ] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

acir_tests/run_acir_tests.sh

@@ -54,7 +54,7 @@ function test() {
     $BB prove_and_verify -c $CRS_PATH -b ./target/$dir_name.bytecode > /dev/null 2>&1
   fi
   result=$?
-  set -xeu
+  set -eu
 
   if [ $result -eq 0 ]; then
     echo -e "\033[32mPASSED\033[0m"