This is a customization. Customization support and implementation assistance are out of the scope of support and the customized scripts will be skipped during an upgrade.
The Procedure section below contains a documentation on how to remove the 'Check Conflicts' button from the Conflicts section of the Change Request form.
1. The button is not coming through any UI action. Rather, the button on the form is due to the UI macro change_request_conflict_progress. The macro can be found here:
2. Line no 101 defines the button in question on the right-hand side of the form section, one can manipulate this line or other parts of the macro to fit business needs. The xml on the above mentioned line is as below:
<button style="white-space: nowrap" class="btn btn-default" id="conflict_action_run">$[gs.getMessage("Check Conflicts")]</button>