Remove comment about sentry use of git_sha

This is acutally only used in the version command

Author: ChrisLovering

Dockerfile

@@ -18,7 +18,6 @@ RUN --mount=type=cache,target=/root/.cache/uv \
 
 FROM python:$python_version
 
-# Define Git SHA build argument for sentry
 ARG git_sha="development"
 ENV GIT_SHA=$git_sha