device-htc-m8: remove screen_[height,width] variables (MR 4799)

The "screen_height" and "screen_width" are deprecated, and can
safely be removed.

[ci:skip-build]: already built successfully in CI

device/testing/device-htc-m8/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=device-htc-m8
 pkgdesc="HTC One M8"
 pkgver=0.1
-pkgrel=17
+pkgrel=18
 url="https://postmarketos.org"
 license="MIT"
 arch="armv7"
@@ -31,7 +31,7 @@ nonfree_firmware() {
 }
 
 sha512sums="
-a516a758dad4204e226f1d628d19ac5d9f9fe0138970ba0995cb25b94746caa1f9f530a81d8befdc914680bafaed34675c895ce09329d0cfb292bf1be49a5dda  deviceinfo
+59f810d4a7c64a8469f198e434af8e54fca9ecc37f3f622273c0bc6d0883e28380cfd2c206322807a5796886023d30220f025e211287cf1454d291061bc2bb48  deviceinfo
 765abaad5fda0dfda5e62e1e48414d3eea822198f39d0792171a04d73f86f6273a6e562afab430cbfcdd084412568a0ad03d012e9c40c5564f5cd1b9c0f181eb  initfs-hook.sh
 f0f69ab3b5b3fed11ec5049f37c71c4e9dcf87dc1f238199a3917dd61957d46783a8798d63d400cc5d3983987e750e3fec6d7117561ad5005f28131ae4821d66  90-android-touch-dev.rules
 "

device/testing/device-htc-m8/deviceinfo

@@ -12,8 +12,6 @@ deviceinfo_arch="armv7"
 deviceinfo_chassis="handset"
 deviceinfo_keyboard="false"
 deviceinfo_external_storage="true"
-deviceinfo_screen_width="1080"
-deviceinfo_screen_height="1920"
 
 # Bootloader related
 deviceinfo_flash_method="fastboot"