video_core: Remove unnecessary enum class casting in logging messages

fmt now automatically prints the numeric value of an enum class member by default, so we don't need to use casts any more.

Reduces the line noise in our code a bit.

Co-Authored-By: LC <712067+lioncash@users.noreply.github.com>

src/video_core/swrasterizer/rasterizer.cpp

@@ -847,7 +847,7 @@ static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Ve
                         return std::min(combiner_output.a(), static_cast<u8>(255 - dest.a()));
 
                     default:
-                        LOG_CRITICAL(HW_GPU, "Unknown blend factor {:x}", static_cast<u32>(factor));
+                        LOG_CRITICAL(HW_GPU, "Unknown blend factor {:x}", factor);
                         UNIMPLEMENTED();
                         break;
                     }