[tmux] Stop using reattach-to-user-namespace

It turns out I've had this misspelled for quite some time so I wasn't
using it anyway, but it's not needed with modern versions of tmux.

Author: dirn

.config/tmux/tmux.conf

@@ -74,9 +74,9 @@ bind-key -n WheelDownPane select-pane -t= \; send-keys -M
 
 # Copy/paste
 bind-key -T copy-mode-vi v send -X begin-selection
-bind-key -T copy-mode-vi y send -X copy-pipe-and-cancel "reattach-to-user-namepsace pbcopy"
+bind-key -T copy-mode-vi y send -X copy-pipe-and-cancel pbcopy
 # Sometimes I don't want to drop back down to the prompt after yanking.
-bind-key -T copy-mode-vi Y send -X copy-pipe "reattach-to-user-namepsace pbcopy"
+bind-key -T copy-mode-vi Y send -X copy-pipe pbcopy
 bind-key P run-shell "tmux set-buffer \"$(pbpaste)\"; tmux paste-buffer"
 
 # Open some applications in a popup.