Remove tat command and automatically loading tmux

This isn't needed now that the tmux-sessioniser is working, and it also
means that there isn't a weird "System32" session automatically created
within WSL2, or with my username in Pop!_OS.

bin/bin/tat

@@ -1,31 +0,0 @@
-#!/bin/sh
-#
-# Attach or create tmux session named the same as current directory.
-
-path_name="$(basename "$PWD" | tr . -)"
-session_name=${1-$path_name}
-
-not_in_tmux() {
-  [ -z "$TMUX" ]
-}
-
-session_exists() {
-  tmux has-session -t "=$session_name"
-}
-
-create_detached_session() {
-  (TMUX='' tmux new-session -Ad -s "$session_name")
-}
-
-create_if_needed_and_attach() {
-  if not_in_tmux; then
-    tmux new-session -As "$session_name"
-  else
-    if ! session_exists; then
-      create_detached_session
-    fi
-    tmux switch-client -t "$session_name"
-  fi
-}
-
-create_if_needed_and_attach

zsh/.zsh/configs/tmux.zsh

@@ -1,11 +0,0 @@
-ensure_tmux_is_running() {
-  if _not_inside_tmux; then
-    tat
-  fi
-}
-
-_not_inside_tmux() {
-  [[ -z "$TMUX" ]]
-}
-
-ensure_tmux_is_running