diff --git a/tmux.conf b/tmux.conf
index 97ab384..9d8da6f 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -72,29 +72,6 @@ set-window-option -g automatic-rename
 # https://github.com/edkolev/dots/blob/master/tmux.conf
 # Updates for tmux 1.9's current pane splitting paths.
 
-# from powerline
-run-shell "tmux set-environment -g TMUX_VERSION_MAJOR $(tmux -V | cut -d' ' -f2 | cut -d'.' -f1 | sed 's/[^0-9]*//g')"
-run-shell "tmux set-environment -g TMUX_VERSION_MINOR $(tmux -V | cut -d' ' -f2 | cut -d'.' -f2 | sed 's/[^0-9]*//g')"
-
-# Vi copypaste mode
-set-window-option -g mode-keys vi
-if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 4 \)'" 'bind-key -Tcopy-mode-vi v send -X begin-selection; bind-key -Tcopy-mode-vi y send -X copy-selection-and-cancel'
-if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 4\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'bind-key -t vi-copy v begin-selection; bind-key -t vi-copy y copy-selection'
-
-# status bar
-if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 2\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'set-option -g status-utf8 on'
-
-# rm mouse mode fail
-if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 1\)' 'set -g mouse off'
-if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 1\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'set -g mode-mouse off'
-
-# fix pane_current_path on new window and splits
-# if-shell "test '#{$TMUX_VERSION_MAJOR} -gt 1 -o \( #{$TMUX_VERSION_MAJOR} -eq 1 -a #{$TMUX_VERSION_MINOR} -ge 8 \)'" 'unbind c; bind c new-window -c "#{pane_current_path}"'
-# if-shell "test '#{$TMUX_VERSION_MAJOR} -gt 1 -o \( #{$TMUX_VERSION_MAJOR} -eq 1 -a #{$TMUX_VERSION_MINOR} -ge 8 \)'" "unbind '\"'; bind '\"' split-window -v -c '#{pane_current_path}'"
-# if-shell "test '#{$TMUX_VERSION_MAJOR} -gt 1 -o \( #{$TMUX_VERSION_MAJOR} -eq 1 -a #{$TMUX_VERSION_MINOR} -ge 8 \)'" 'unbind v; bind v split-window -h -c "#{pane_current_path}"'
-# if-shell "test '#{$TMUX_VERSION_MAJOR} -gt 1 -o \( #{$TMUX_VERSION_MAJOR} -eq 1 -a #{$TMUX_VERSION_MINOR} -ge 8 \)'" 'unbind %; bind % split-window -h -c "#{pane_current_path}"'
-
-
 # Colors
 # How to use true colors in vim under tmux? #1246 for 2.6 and higher
 # https://github.com/tmux/tmux/issues/1246:
@@ -103,17 +80,6 @@ if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 1\) -o #
 # 2.5 and lower:
 # set -g default-terminal "screen-256color"
 
-# Doesn't work on iterm2 / mac
-# if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 6 \)'" 'set -g default-terminal "tmux-256color"'
-# if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 6 \)'" 'set -ga terminal-overrides ",*256col*:Tc"'
-
-# Try screen256-color (https://github.com/tmux/tmux/issues/622):
-if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 6 \)'" 'set -g default-terminal "screen-256color"'
-if-shell "test '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -ge 6 \)'" 'set -ga terminal-overrides ",screen-256color:Tc"'
-
-if-shell '\( #{$TMUX_VERSION_MAJOR} -eq 2 -a #{$TMUX_VERSION_MINOR} -lt 6\) -o #{$TMUX_VERSION_MAJOR} -le 1' 'set -g default-terminal "screen-256color"'
-
-
 # # True color settings, see https://jdhao.github.io/2018/10/19/tmux_nvim_true_color/ for the details.
 set -g default-terminal "xterm-256color"
 # If terminal supports true color, use the following options.