bring down migration timeout in delete doc lines to 0ms

migrations/2_doc_lines_delete_from_project.coffee

@@ -167,7 +167,7 @@ processNext = (project_id, callback)->
 							markProjectAsProcessed project_id, (err)->
 								setTimeout(
 									-> callback(err)
-								,5000)
+								,0)
 
 exports.migrate = (client, done = ->)->
 	getProjectIds (err, ids)->