remove extensions we won't support from CMake (Bullet will be replaced by Jolt)

Author: devsh

src/nbl/ext/CMakeLists.txt

@@ -13,17 +13,6 @@ option(NBL_BUILD_TEXT_RENDERING "Enable Nabla Text Rendering extension building
 # proper configuration handle! The only thing each extension should 
 # pass as an internal cache variable is it's target name.
 
-if (NBL_BUILD_BULLET)
-    add_subdirectory(Bullet)
-    set(NBL_EXT_BULLET_INCLUDE_DIRS
-        ${NBL_EXT_BULLET_INCLUDE_DIRS}
-        PARENT_SCOPE
-    )
-    set(NBL_EXT_BULLET_LIB
-        ${NBL_EXT_BULLET_LIB}
-        PARENT_SCOPE
-    )
-endif()
 
 if (NBL_BUILD_MITSUBA_LOADER)
     add_subdirectory(MitsubaLoader)
@@ -37,18 +26,6 @@ if (NBL_BUILD_MITSUBA_LOADER)
     )
 endif()
 
-if (NBL_BUILD_RADEON_RAYS)
-    add_subdirectory(RadeonRays)
-    set(NBL_EXT_RADEON_RAYS_INCLUDE_DIRS
-        ${NBL_EXT_RADEON_RAYS_INCLUDE_DIRS}
-        PARENT_SCOPE
-    )
-    set(NBL_EXT_RADEON_RAYS_LIB
-        ${NBL_EXT_RADEON_RAYS_LIB}
-        PARENT_SCOPE
-    )
-endif()
-
 if (NBL_BUILD_OPTIX)
     add_subdirectory(OptiX)
     set(NBL_EXT_OPTIX_INCLUDE_DIRS