Revert changes made for Windows 10/11 mkdir -p failure

[TinCanTech]

#1073, #1075 and more..

Improve the safe-guard made here:

easy-rsa/distro/windows/bin/easyrsa-shell-init.sh

Lines 111 to 124 in f92ca40

	# Check for broken administrator access
	# https://github.com/OpenVPN/easy-rsa/issues/1072
	[ -d "$HOME" ] || access_denied "-d HOME"
	win_tst_d="$HOME"/easyrsa-write-test
	# Required tests
	mkdir "$win_tst_d" 2>/dev/null || access_denied "mkdir"
	[ -d "$win_tst_d" ] || access_denied "-d"
	echo 1 >"$win_tst_d"/1 2>/dev/null || access_denied "write"
	[ -f "$win_tst_d"/1 ] || access_denied "-f"
	rm -rf "$win_tst_d" 2>/dev/null || access_denied "rm"
	[ ! -d "$win_tst_d" ] || access_denied "! -d"
	unset -v win_tst_d
	unset -f access_denied

If Windows does not work then there is no point going further than here.

Revert:

• 14ffb55