Rework how screen is handled upon login.

.bashrc

@@ -1,28 +1,3 @@
-# Functions.
-screen_attach() {
-  local TTY SCREENS
-  # Only continue if it's not a remote connection, and not inside screen already.
-  [[ -z "$SSH_TTY" ]] && [[ -z "$STY" ]] && {
-    TTY="$(tty | cut -d/ -f3-)"
-    SCREENS="$(screen -list | fgrep -v "Dead" | fgrep "${HOSTNAME%%.*}" | fgrep "${TTY//\//-}")"
-    case "$(echo "${SCREENS:--n}" | wc -l)" in
-      0)
-        # No screens found - start a new instance.
-        screen
-        ;;
-      1)
-        # Just one screen - reconnect.
-        screen -dr "${TTY//\//-}.${HOSTNAME%%.*}"
-        ;;
-      *)
-        # Multiple screens - output a list
-        echo "Multiple screens found for $TTY:"
-        echo "$SCREENS" | sed -e 's/^/    /g'
-        ;;
-    esac
-  }
-}
-
 # Make bash a little more pleasent - these are valid for all versions.
 shopt -s cdspell checkhash checkwinsize cmdhist histappend no_empty_cmd_completion