Merge branch 'dd-is-dead' into 'master'

Remove Direct Draw from AppVeyor config

See merge request STJr/SRB2!622

appveyor.yml

@@ -55,8 +55,6 @@ cache:
 install:
 - if [%CONFIGURATION%] == [SDL64] ( set "X86_64=1" )
 - if [%CONFIGURATION%] == [SDL64] ( set "CONFIGURATION=SDL" )
-- if [%CONFIGURATION%] == [DD64] ( set "X86_64=1" )
-- if [%CONFIGURATION%] == [DD64] ( set "CONFIGURATION=DD" )
 - if [%X86_64%] == [1] ( set "MINGW_SDK=%MINGW_SDK_64%" )
 - if [%X86_64%] == [1] ( set "CCACHE_CC=%CCACHE_CC_64%" )
 
@@ -75,13 +73,6 @@ install:
 configuration:
 - SDL
 - SDL64
-- DD
-- DD64
-
-matrix:
-  allow_failures:
-    - configuration: DD
-    - configuration: DD64
 
 before_build:
 - set "Path=%MINGW_SDK%\bin;%Path%"