bin: remove tmux wrapper script

Going back to the alias solution, which works for both bash and zsh, to
avoid having to search through the path for the real tmux after I remove
the leading comma from my custom command names.

bin/,tmux

@@ -1,3 +0,0 @@
-#!/bin/sh
-exec tmux -f "$XDG_CONFIG_HOME/tmux/tmux.conf" "$@"
-

files/aliases.sh

@@ -36,6 +36,8 @@ alias grep="grep --color=auto"
 alias egrep="egrep --color=auto"
 alias fgrep="fgrep --color=auto"
 
+alias tmux="tmux -f $XDG_CONFIG_HOME/tmux/tmux.conf"
+
 if command -v nvim >/dev/null 2>&1; then
     alias vim="nvim"
     alias vimdiff="nvim -d"