ddraw: Remove a useless material callback.

dlls/ddraw/ddraw.c

@@ -4457,7 +4457,6 @@ static HRESULT WINAPI d3d3_CreateMaterial(IDirect3D3 *iface, IDirect3DMaterial3
     object->IDirect3DMaterial_vtbl = &IDirect3DMaterial_Vtbl;
     object->ref = 1;
     object->ddraw = ddraw_from_d3d3(iface);
-    object->activate = material_activate;
 
     TRACE("Created material %p.\n", object);
     *material = (IDirect3DMaterial3 *)object;

dlls/ddraw/ddraw_private.h

@@ -550,8 +550,6 @@ struct IDirect3DMaterialImpl
 
     D3DMATERIAL mat;
     DWORD Handle;
-
-    void (*activate)(IDirect3DMaterialImpl* this);
 };
 
 /* VTables in various versions */

dlls/ddraw/device.c

@@ -3044,7 +3044,7 @@ IDirect3DDeviceImpl_3_SetLightState(IDirect3DDevice3 *iface,
         }
 
         TRACE(" activating material %p.\n", m);
-        m->activate(m);
+        material_activate(m);
 
         This->material = Value;
     }

dlls/ddraw/executebuffer.c

@@ -261,7 +261,7 @@ IDirect3DExecuteBufferImpl_Execute(IDirect3DExecuteBufferImpl *This,
                         if (!m)
                             ERR("Invalid material handle %#x.\n", ci->u2.dwArg[0]);
                         else
-                            m->activate(m);
+                            material_activate(m);
                     }
                     else if (ci->u1.dlstLightStateType == D3DLIGHTSTATE_COLORMODEL /* 3 */)
                     {