Remove snes_spc gitsubmodule

.gitmodules

@@ -22,9 +22,6 @@
 [submodule "src/lib/asar"]
 	path = src/lib/asar
 	url = https://github.com/RPGHacker/asar.git
-[submodule "src/lib/snes_spc"]
-	path = src/lib/snes_spc
-	url = https://github.com/blarggs-audio-libraries/snes_spc.git
 [submodule "src/lib/SDL_mixer"]
 	path = src/lib/SDL_mixer
 	url = https://github.com/libsdl-org/SDL_mixer.git

CMakeLists.txt

@@ -33,22 +33,6 @@ include(cmake/sdl2.cmake)
 # add_subdirectory(src/lib/asar/src)
 # include(cmake/asar.cmake)
 
-# snes-spc
-ADD_DEFINITIONS(-DSNES_SPC_EXPORTS)
-set(SNES_SPC_SOURCES
-  "../src/lib/snes_spc/snes_spc/spc.cpp"
-  "../src/lib/snes_spc/snes_spc/SNES_SPC.cpp"
-  "../src/lib/snes_spc/snes_spc/SNES_SPC_misc.cpp"
-  "../src/lib/snes_spc/snes_spc/SNES_SPC_state.cpp"
-  "../src/lib/snes_spc/snes_spc/SPC_DSP.cpp"
-  "../src/lib/snes_spc/snes_spc/dsp.cpp"
-  "../src/lib/snes_spc/snes_spc/SPC_Filter.cpp"
-  "../src/lib/snes_spc/demo/wave_writer.c"
-  "../src/lib/snes_spc/demo/demo_util.c"
-)
-include_directories(src/lib/snes_spc/snes_spc)
-ADD_LIBRARY(snes_spc STATIC ${SNES_SPC_SOURCES} src/app/zelda3/music/spc700.def)
-
 # ImGui
 include(cmake/imgui.cmake)