remove prints and useless comments

app/controllers/projects/blob_controller.rb

@@ -43,8 +43,8 @@ class Projects::BlobController < Projects::ApplicationController
         diffs_namespace_project_merge_request_path(from_merge_request.target_project.namespace, from_merge_request.target_project, from_merge_request) +
           "#file-path-#{hexdigest(@path)}"
       else
-        # params[:file_name] stores the new name for the file
         unless params[:file_name] == @path
+          previous_path = @path
           @path = params[:file_name]
         end