Remove redudant _3D_DISABLED check from csg module

It even won't be considered for building so there is no any sense
for compile time checks

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

modules/csg/register_types.cpp

@@ -30,8 +30,6 @@
 
 #include "register_types.h"
 
-#ifndef _3D_DISABLED
-
 #include "csg_shape.h"
 
 #ifdef TOOLS_ENABLED
@@ -62,5 +60,3 @@ void uninitialize_csg_module(ModuleInitializationLevel p_level) {
 		return;
 	}
 }
-
-#endif // _3D_DISABLED