Remove git reset --hard command in web template to reduce layer size

I noticed that use running `git reset --hard` results in ~133MB being
added to the final layer generated by `launcher bootstrap`. However, I
can not figure out why we would need to run `git reset --hard` at all.

Even if there is a reason to run `git reset --hard`, it should not be
the default. If someone for whatever reason needs to run `git reset
--hard`, they should do so using the `before_code` hook.

Author: tgxworld

templates/web.template.yml

@@ -91,7 +91,6 @@ run:
       cd: $home
       hook: code
       cmd:
-        - sudo -H -E -u discourse git reset --hard
         - sudo -H -E -u discourse git clean -f
         # TODO Remove the special handling of shallow clones when everyone uses images without that clone type
         - |-