OpenDingux: Remove RS90 stuff

That device only has a 2-inch screen and doesn't have X/Y so I don't
think there is a point in porting to it.

Packaging/OpenDingux/build-rs90.sh

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-declare -r DIR="$(dirname "${BASH_SOURCE[0]}")"
-"${DIR}/build.sh" rs90

Packaging/OpenDingux/build.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 
 usage() {
 	echo "Usage: build.sh [target]"
-	echo "	target: target architecture. Either rs90, rg350 or retrofw"
+	echo "	target: target architecture. Either rg350 or retrofw"
 }
 
 if [[ $# -ne 1 ]]; then
@@ -13,7 +13,7 @@ if [[ $# -ne 1 ]]; then
 	exit 1
 fi
 
-if [[ "$1" != "rs90" ]] && [[ "$1" != "rg350" ]] && [[ "$1" != "retrofw" ]]; then
+if [[ "$1" != "rg350" ]] && [[ "$1" != "retrofw" ]]; then
 	echo "Error: invalid target"
 	usage
 	exit 1
@@ -47,9 +47,7 @@ prepare_buildroot() {
 	fi
 	if [[ "$TARGET" == "rg350" ]]; then
 		git clone --depth=1 https://github.com/tonyjih/RG350_buildroot.git "$BUILDROOT"
-	elif [[ "$TARGET" == "rs90" ]]; then
-		git clone --depth=1 -b od-rs90 https://github.com/OpenDingux/buildroot.git "$BUILDROOT"
-	else
+	else # retrofw
 		if [[ ! -f $BUILDROOT_ARCHIVE ]]; then
 			\curl https://buildroot.org/downloads/${BUILDROOT_VER}.tar.gz -o "$BUILDROOT_ARCHIVE"
 		fi
@@ -112,9 +110,7 @@ build() {
 			-DJOY_BUTTON_START=9
 			-DJOY_BUTTON_BACK=8
 		)
-	elif [[ "$TARGET" == "rs90" ]]; then
-		defs+=(-DUSE_SDL1=ON)
-	else
+	else # retrofw
 		defs+=(
 			-DUSE_SDL1=ON
 			-DRETROFW=ON

README.md

@@ -99,16 +99,21 @@ Make sure to install the `C++ CMake tools for Windows` component for Visual Stud
 * **Using vcpkg (recommended)**
 1. Install vcpkg following the instructions from https://github.com/microsoft/vcpkg#quick-start.
 
-	Don't forget to perform _user-wide integration_ step for additional convenience.
+   Don't forget to perform _user-wide integration_ step for additional convenience.
 2. Install required dependencies by executing the following command (via cmd or powershell):
 
- 	For the 64-bit version of the dependencies please run this command: 
-	`vcpkg install sdl2:x64-windows sdl2-mixer:x64-windows sdl2-ttf:x64-windows libsodium:x64-windows`
-	
-	
-	For the 32-bit version of the dependencies please run this command: 
-	`vcpkg install sdl2:x86-windows sdl2-mixer:x86-windows sdl2-ttf:x86-windows libsodium:x86-windows`
-	
+   For the 64-bit version of the dependencies please run this command:
+
+   ```
+   vcpkg install sdl2:x64-windows sdl2-mixer:x64-windows sdl2-ttf:x64-windows libsodium:x64-windows
+   ```
+
+   For the 32-bit version of the dependencies please run this command:
+
+   ```
+   vcpkg install sdl2:x86-windows sdl2-mixer:x86-windows sdl2-ttf:x86-windows libsodium:x86-windows
+   ```
+
 * **Manually**
 1. Download and place the MSVC Development Libraries of [SDL2](https://www.libsdl.org/download-2.0.php), [SDL2_mixer](https://www.libsdl.org/projects/SDL_mixer/), [SDL2_ttf](https://www.libsdl.org/projects/SDL_ttf/) and [Libsodium](https://github.com/jedisct1/libsodium/releases) in `%USERPROFILE%\AppData\Local\Microsoft\WindowsApps\`.
 2. If dependencies are not found or you wish to place them in other location - configure required path variables in _"Manage Configurations..."_ dialog inside Visual Studio or in _cmake-gui_.
@@ -186,16 +191,6 @@ This OpenDingux build uses the buildroot at `$HOME/buildroot-rg350-devilutionx`.
 Packaging/OpenDingux/build-rg350.sh
 ~~~
 
-
-### Old OpenDingux (RS90)
-
-This OpenDingux build uses the buildroot at `$HOME/buildroot-rs90-devilutionx`.
-
-~~~ bash
-Packaging/OpenDingux/build-rs90.sh
-~~~
-
-
 </details>
 
 ## CMake arguments