Remove detection of unused PulseAudio audio libary. (Kenix3#421)

* Remove detection of unused PulseAudio audio libary.

* Remove unused PulseAudio backend refecences from the code completely.

Author: vanfanel

src/CMakeLists.txt

@@ -465,11 +465,6 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
     target_link_libraries(libultraship PRIVATE ${OSX_FOUNDATION} ${OSX_AVFOUNDATION} ${METAL} ${QUARTZCORE} ${CMAKE_DL_LIBS})
 endif()
 
-if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-    find_package(PulseAudio)
-    target_link_libraries(libultraship PRIVATE ${PULSEAUDIO_LIBRARY})
-endif()
-
 if (USE_OPENGLES)
     if (CMAKE_SYSTEM_NAME STREQUAL "Android")
         find_library(OPENGLES_LIBRARY GLESv3)

src/audio/Audio.cpp

@@ -36,9 +36,6 @@ void Audio::Init() {
     mAvailableAudioBackends = std::make_shared<std::vector<AudioBackend>>();
 #ifdef _WIN32
     mAvailableAudioBackends->push_back(AudioBackend::WASAPI);
-#endif
-#ifdef __linux
-    mAvailableAudioBackends->push_back(AudioBackend::PULSE);
 #endif
     mAvailableAudioBackends->push_back(AudioBackend::SDL);
 

src/audio/Audio.h

@@ -6,7 +6,7 @@
 #include "audio/AudioPlayer.h"
 
 namespace LUS {
-enum class AudioBackend { WASAPI, PULSE, SDL };
+enum class AudioBackend { WASAPI, SDL };
 
 class Audio {
   public: