Splice configs/shared directory

- Move all children from configs/shared into configs.
- Delete "shared" directory.

configs/shared/.xsessionrc

@@ -1,22 +0,0 @@
-#!/bin/sh
-
-# Might be unnecessary...
-. ~/.profile
-
-export DESKTOP_SESSION=cinnamon  # gnome for trusty.
-
-# Desktop background color.
-xsetroot -solid "#333333"
-
-# Set fallback cursor.
-xsetroot -cursor_name left_ptr
-
-# `unclutter` hide the cursor in when it is inactive
-unclutter &
-
-# Control X's pointer with the keyboard. Activate by pressing <C-;>
-keynav daemonize
-
-# Startup Emacs (and EXWM). This is built by calling `make install` from within
-# ~/dotfiles/emacs.
-dbus-launch --exit-with-session wpcarros-emacs