Meta: Do not run shellcheck on our Shell's scripts

Author: https://github.com/alimpfard
Commit: 2b80a45f82
Pull-request: https://github.com/SerenityOS/serenity/pull/2542
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bugaevc

Meta/lint-shell-scripts.sh

@@ -18,6 +18,7 @@ done < <(git ls-files -- \
     '*.sh' \
     ':!:Toolchain' \
     ':!:Ports' \
+    ':!:Shell/Tests' \
 )
 
 if (( ${#ERRORS[@]} )); then