Use /.timer instead of /timer, the dot in front of a command is used to silent the command:

Originally Posted By: /help Command Prefixes
If you want to force a command to perform quietly ie. without printing out any information, then you can prefix it with a "." full stop. For example:

/ignore somenick

Would print out information telling you that you are now ignoring "somenick". If you do not want this information to be displayed, then you can use:

/.ignore somenick



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