To hide the check box that says "keep me logged in" within a Survey, complete the following steps:
  1. Select "Survey" from the Content drop down
  2. Edit the Survey
  3. On Step 2: Include Questions, Edit the question type "Constituent Registration Info"
  4. Go to Step D: "Select Layout and Processing Options"
  5. Select the second radio button on Step 4: "Automatic Log In of New Constituents" that says: "Do not log in new constituents who submit responses to this survey"