ok....so if you REALLY need to remove options like delete from the list action menu, the actions can be found in System UI\UI Actions. From there there are multiple ways to set conditions on visibility for the action. This link describes the process: UI Actions - ServiceNow Wiki
Just remember, if you modify a default action, you now own that action and it will not receive updates when patches come out. Using the UI Action Visibility related list to do this would probably be the preferred way to avoid future update issues.
