dont do pulls in web's services/runner.rb

[JonJagger]

web's services/runner does this

def run_cyber_dojo_sh(args)
    # Pull image first to avoid pulling/timeout errors on CI workflow run
    pull_args = { id: args[:id], image_name: args[:manifest][:image_name] }
    outcome = 'pulling'
    n = 0
    while outcome != 'pulled' && n < 20
      outcome = pull_image(pull_args)
      n += 1
      sleep(0.25)
    end
    @http.get(__method__, args)
  end

Fix this so the pulls happen in the CI script and not here.