Removed the unused SDL1 part from AppVeyor

.appveyor.yml

@@ -14,15 +14,12 @@ environment:
   SDL1_IDIR: c:\mylibs\include\SDL
   SDL2_IDIR: c:\mylibs\include\SDL2
   LIBDIR: c:\mylibs\lib
-  matrix:
-    - SDL_VER: 2
 
 
 install:
   - git submodule update --init --recursive
   - cmake --version
   - mkdir %ZLIB_IDIR%
-  - mkdir %SDL1_IDIR%
   - mkdir %SDL2_IDIR%
   - mkdir %LIBDIR%
   - cd %TEMP%
@@ -31,22 +28,6 @@ install:
   - 7z x zlib128-dll.zip > nul
   - copy include\* %ZLIB_IDIR% > nul
   - copy lib\* %LIBDIR% > nul
-  # Download SDL1
-  - appveyor DownloadFile https://www.libsdl.org/release/SDL-devel-1.2.15-VC.zip
-  - appveyor DownloadFile https://www.libsdl.org/projects/SDL_image/release/SDL_image-devel-1.2.12-VC.zip
-  - appveyor DownloadFile https://www.libsdl.org/projects/SDL_mixer/release/SDL_mixer-devel-1.2.12-VC.zip
-  # Extract files
-  - 7z x SDL-devel-1.2.15-VC.zip > nul
-  - 7z x SDL_image-devel-1.2.12-VC.zip > nul
-  - 7z x SDL_mixer-devel-1.2.12-VC.zip > nul
-  # Set up includes
-  - copy SDL-1.2.15\include\* %SDL1_IDIR% > nul
-  - copy SDL_image-1.2.12\include\* %SDL1_IDIR% > nul
-  - copy SDL_mixer-1.2.12\include\* %SDL1_IDIR% > nul
-  # Set up libs
-  - copy SDL-1.2.15\lib\x86\* %LIBDIR% > nul
-  - copy SDL_image-1.2.12\lib\x86\* %LIBDIR% > nul
-  - copy SDL_mixer-1.2.12\lib\x86\* %LIBDIR% > nul
   # Download SDL2
   - appveyor DownloadFile https://www.libsdl.org/release/SDL2-devel-2.0.14-VC.zip
   - appveyor DownloadFile https://www.libsdl.org/projects/SDL_image/release/SDL2_image-devel-2.0.5-VC.zip
@@ -66,13 +47,11 @@ install:
 
 build_script:
   - cd %APPVEYOR_BUILD_FOLDER%
-  - if [%SDL_VER%]==[1] (set WITH_SDL2=OFF) else (set WITH_SDL2=ON)
-  - if [%SDL_VER%]==[1] (set WITH_PNG=OFF) else (set WITH_PNG=ON)
   - cmake
       -DCMAKE_PREFIX_PATH=%BASEDIR%
       -DCMAKE_BUILD_TYPE=Release
-      -DUSE_SDL2_LIBS=%WITH_SDL2%
-      -DUSE_PNG_SAVE=%WITH_PNG%
+      -DUSE_SDL2_LIBS=ON
+      -DUSE_PNG_SAVE=ON
       -G "Visual Studio 15 2017" .
   - cmake --build . --config Release