refactor(cli): remove bin/doom.cmd

This batch script hasn't worked for some time. For v3, I'm working on a
Emacs TUI porcelain for the bin/doom script that will serve as a
replacement/alternative for folks on Windows (or who simply don't
want/need the CLI).

bin/doom.cmd

@@ -1,25 +0,0 @@
-:: Forward the ./doom script to Emacs
-
-@ECHO OFF
-SETLOCAL ENABLEDELAYEDEXPANSION
-
-PUSHD "%~dp0" >NUL
-
-SET args=
-SET command=%1
-
-:LOOP
-SHIFT /1
-IF NOT [%1]==[] (
-    SET args=%args% %1
-    GOTO :LOOP
-)
-
-IF [%command%]==[run] (
-   start runemacs -Q %args% -l ..\init.el -f "doom-run-all-startup-hooks-h"
-) ELSE (
-   emacs --quick --script .\doom -- %*
-)
-
-POPD >NUL
-ECHO ON