SDL: Remove FreeImage paths from CMakeLists

We don't use FreeImage anymore, for both security and practicality
reasons since SDL already has methods to save screenshots.

src/sdl2/CMakeLists.txt

@@ -5,18 +5,8 @@ project(sdl_interface CXX)
 find_package(SDL2 REQUIRED CONFIG REQUIRED COMPONENTS SDL2)
 find_package(SDL2 REQUIRED CONFIG COMPONENTS SDL2main)
 
-include_directories(${SDL2_INCLUDE_DIRS})
-
-find_path(FreeImage_INCLUDE_DIR FreeImage.h HINTS ${FREEIMAGE_DIR})
-find_library(FreeImage_LIBRARY NAMES FreeImage HINTS ${FREEIMAGE_DIR})
-
-include_directories(${FreeImage_INCLUDE_DIR})
-
 add_executable(sdl_interface anbu.cpp)
 
-target_link_libraries(sdl_interface ${SDL2_LIBRARIES})
-target_link_libraries(sdl_interface ${FreeImage_LIBRARY})
-
 install(
  TARGETS sdl_interface
  RUNTIME DESTINATION bin