dotfiles: update vim, bash, tmux

tmux/.tmux.conf

@@ -1,8 +1,6 @@
 # NOTE: First of all install TPM
 # git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
 
-set-option -g default-command "reattach-to-user-namespace -l bash"
-
 # Set the base index for windows to 1 instead of 0.
 set -g base-index 1
 
@@ -47,8 +45,6 @@ set -g status-justify centre
 # => Bindings
 # Kill pane without confirmation
 bind-key x kill-pane
-bind-key \ split-window -h
-bind-key - split-window -v
 
 # Painless copying with tmux-yank
 unbind [
@@ -70,9 +66,7 @@ set -g @plugin 'tmux-plugins/tmux-sensible'
 
 # Depends on 'urlview'
 set -g @plugin 'tmux-plugins/tmux-urlview'
-set -g @plugin 'tmux-plugins/tmux-copycat'
 set -g @plugin 'tmux-plugins/tmux-yank'
-set -g @plugin 'tmux-plugins/tmux-open'
 
 # Default keysbindings for panes
 set -g @plugin 'tmux-plugins/tmux-pain-control'