What filter should i use to remove the "\" from my logfile

Elastic Stack Logstash
6

i tried and i get this error

[2017-07-06T13:28:32,381][ERROR][logstash.agent ] Cannot create pipeline {:reason=>"Expected one of #, {, ,, ] at line 15, column 23 (byte 224) after filter {\n mutate {\n gsub => [\n # replace backslash\n # with a dot "."\n "LogMsg", "\", ""}