Remove _tarsnap

because it provides the zsh completion file now

src/_tarsnap

@@ -1,64 +0,0 @@
-#compdef tarsnap
-# ------------------------------------------------------------------------------
-# Copyright (c) 2014-2017 Daniel Teunis - https://github.com/danteu
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-# ------------------------------------------------------------------------------
-# Description
-# -----------
-#
-#  Completion script for tarsnap 1.0.39 (http://tarsnap.com).
-#
-# ------------------------------------------------------------------------------
-# Author
-# -------
-#
-#  * Daniel Teunis <daniel@teunis.cc>
-#
-# ------------------------------------------------------------------------------
-
-_arguments \
-  '(- 1 *)--help[prints tarsnap help]' \
-  '(- 1 *)--version[prints tarsnap version number]' \
-  '(- 1 *)--verify-config[checks configuration files for syntactic errors]' \
-  '--fsck[performs integrity checks on the stored archives]' \
-  '--fsck-prune[performs integrity checks and prunes broken data]' \
-  '--list-archives[prints names of stored archives]' \
-  '--nuke[deletes all stored archives]' \
-  '--print-stats[prints archive statistics]' \
-  '--recover[recovers partial archive]' \
-  '-c[creates archive]' \
-  '-d[deletes specified archive]' \
-  '-r[prints content of specified archive]' \
-  '-t[lists archive content]' \
-  '-x[extracts specified archive]' \
-  '--lowmem[reduces memory usage by not caching small files]' \
-  '--quiet[silences some warnings]' \
-  '--keyfile[specifies keyfile]:keyfile:->file' \
-  '--cachedir[specifies cache directory]:cachedir:->directory' \
-  '-f[specifies archive name]:archivename:->file'
-
-case "$state" in
-  file)
-    _files
-    ;;
-  directory)
-    _path_files -/
-    ;;
-esac