--- a/rc/shellinit-posix	Thu Jan 09 03:13:02 2025 +0900
+++ b/rc/shellinit-posix	Thu Jan 09 03:16:29 2025 +0900
@@ -9,24 +9,6 @@
 export LC_COLLATE=C
 export LC_MESSAGES=C
 
-if command -v tmux > /dev/null 2>&1; then
-  case "${_os}" in
-  OpenBSD)
-    # FIXME: OpenBSD version check
-    _tmux_conf_ver=1.9
-  ;;
-  *)
-    case "$(tmux -V 2> /dev/null)" in
-    "tmux 1."[1-9][0-9]*|"tmux 1.9"*) _tmux_conf_ver=1.9;;
-    "tmux 1."[4-8]*) _tmux_conf_ver=1.4;;
-    *) _tmux_conf_ver=1.3;;
-    esac
-  ;;
-  esac
-  alias tmux="tmux -f '""${HOME}""/.tmux-""${_tmux_conf_ver}"".conf'"
-  unset _tmux_conf_ver
-fi
-
 if command -v vim > /dev/null 2>&1; then
   alias vi=vim
   export EDITOR=vim