Drop the syntax benchmark step from CI
The step wrote its output to a file nothing read since benchmark tracking was disabled, so it only cost about 30 seconds per run.
Semantic Diff
2 commits
7249c119e4b590a831809c68ac8546baa05ca6bf..pr-9147The step wrote its output to a file nothing read since benchmark tracking was disabled, so it only cost about 30 seconds per run.
The skip for macOS 13 worked around hangs on a runner CI no longer uses: CI runs on macos-26 and the Makefile refuses Intel Macs.