clean cmake file

engine/CMakeLists.txt

@@ -282,7 +282,6 @@ set (RENDERERS_SRC
 	renderers/Mesh.cpp
 	renderers/Sprite.cpp
 	renderers/Material.cpp
-	renderers/Particles.cpp
 	renderers/DebugLine.cpp
 )
 
@@ -292,7 +291,6 @@ set (RENDERERS_HEADERS
 	renderers/Mesh.h
 	renderers/Sprite.h
 	renderers/Material.h
-	renderers/Particles.h
 	renderers/DebugLine.h
 )