Remove "Delete Category" button from "Edit Project Category" page

Fixes #27808

manage_proj_cat_edit_page.php

@@ -117,15 +117,6 @@
 	</form>
 	</div>
 </div>
-
-<div class="col-md-12 col-xs-12">
-	<form method="post" action="manage_proj_cat_delete.php" class="pull-right">
-		<fieldset>
-			<?php echo form_security_field( 'manage_proj_cat_delete' ) ?>
-			<input type="hidden" name="id" value="<?php echo string_attribute( $f_category_id ) ?>" />
-			<input type="submit" class="btn btn-sm btn-primary btn-white btn-round" value="<?php echo lang_get( 'delete_category_button' ) ?>" />
-		</fieldset>
-	</form>
-</div><?php
+<?php
 
 layout_page_end();