Finish migrating to tmux

fix environment variable being reset to most recent value in new panels

legacy/.screenrc

@@ -1,34 +0,0 @@
-# http://aperiodic.net/screen/commands:start
-
-# see accompanying file ~/.ssh/rc
-setenv SSH_AUTH_SOCK $HOME/.ssh/ssh_auth_sock
-
-# no screen blinking on bell
-vbell off
-startup_message off
-# disable "New screen..." message
-msgwait 0
-defscrollback 10240
-# hostname, timestamp, LA in status bar
-caption always "%{+b}%H | %c %d.%m.%Y | Load: %l"
-# colored window list
-hardstatus alwayslastline "%-Lw%{= BW}%50>%n%f* %t%{-}%+Lw%<"
-# Launch login shells
-shell -${SHELL}
-# 256color support
-#termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'
-term screen-256color
-#defbce "on"
-# beep on activity monitor alert (C-a M)
-# ex.: 12:37 activity -> 7$ zsh
-activity "%c activity -> %n%f %t^G"
-
-# Alt Left/Right = switch windows
-bindkey "^[[1;3D" prev
-bindkey "^[[1;3C" next
-bindkey "^[b" prev
-bindkey "^[f" next
-# Alt N = new window
-bindkey "^[n" screen
-
-shelltitle '% |zsh'