Remove redundant check in SchoolStudentsController.

Author: fspeirs

app/controllers/api/school_students_controller.rb

@@ -117,7 +117,7 @@ def destroy
     def destroy_batch
       student_ids = student_ids_params
 
-      if student_ids.blank? || student_ids.empty?
+      if student_ids.blank?
         render json: {
                  error: 'No student IDs provided',
                  error_type: :unprocessable_entity