port: fix SHADE_ALPHA with fog again

port/fast3d/gfx_pc.cpp

@@ -1569,12 +1569,7 @@ static void gfx_sp_tri1(uint8_t vtx1_idx, uint8_t vtx2_idx, uint8_t vtx3_idx, bo
                     }
 #endif
                 } else {
-                    if (use_fog && color == &v_arr[i]->color) {
-                        // Shade alpha is 100% for fog
-                        buf_vbo[buf_vbo_len++] = 1.0f;
-                    } else {
-                        buf_vbo[buf_vbo_len++] = color->a / 255.0f;
-                    }
+                    buf_vbo[buf_vbo_len++] = color->a / 255.0f;
                 }
             }
         }