VideoCommon: cleanup of "components" usage

This "u32 components" is a list of flags which attributes of the vertex loader are present.
We are used to append this variable to lots of vertex generation functions, but some of them don't need it at all.

Source/Core/VideoCommon/NativeVertexFormat.h

@@ -101,7 +101,6 @@ public:
 
 	virtual void Initialize(const PortableVertexDeclaration &vtx_decl) = 0;
 	virtual void SetupVertexPointers() = 0;
-	virtual void EnableComponents(u32 components) {}
 
 	u32 GetVertexStride() const { return vertex_stride; }