Revert syntect_server update (segfaulting) (#14456)
Created by: slimsag
This reverts commit 284ddb42b0b6b4ee15786104ef7556b2e5b57820.
Not sure why but the binary is segfaulting when copied into the server
image and as such only failed on CI after merge: https://buildkite.com/sourcegraph/sourcegraph/builds/75505
Reverting while I investigate/fix.