Remove torctl.in from contrib/dist

This file was introduced in 2004 (acb2c10a5bd99bac12f07f476e3f016b4277dbbf) and last touched during maintenance activities in 2014 (9230bc7c65cec68c66fa9c75751d6c6bd600e9fc). I suggest we remove it, so that we get closer to covering all of our shellscripts with shellcheck.

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