Don't set up network by configuring wpa_supplicant manually

[johanvx]

blog/posts/install_arch_linux_on_a_laptop.md

Lines 134 to 159 in f7b9748

	Now, connect to the Internet with `wpa_supplicant`. Note that `iwctl` and
	`wpa_cli` suffice in general.
	```
	console:
	# touch /etc/wpa_supplicant.conf
	# vim /etc/wpa_supplicant.conf
	/etc/wpa_supplicant.conf:
	ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
	update_config=1
	network={
	ssid="SSID"
	key_mgmt=WPA-EAP
	identity="identity"
	password="password"
	}
	console:
	# wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
	# dhcpcd --background
	```

Use nmcli or nmtui provided by NetworkManager instead.