gpu: Remove obsoleted CDMAPusher() accessors

These were obsoleted in 2c47f8aa1886522898b5b3a73185b5662be3e9f3 but
were accidentally overlooked.

src/video_core/gpu.h

@@ -190,12 +190,6 @@ public:
     /// Returns a const reference to the GPU DMA pusher.
     [[nodiscard]] const Tegra::DmaPusher& DmaPusher() const;
 
-    /// Returns a reference to the GPU CDMA pusher.
-    [[nodiscard]] Tegra::CDmaPusher& CDmaPusher();
-
-    /// Returns a const reference to the GPU CDMA pusher.
-    [[nodiscard]] const Tegra::CDmaPusher& CDmaPusher() const;
-
     /// Returns a reference to the underlying renderer.
     [[nodiscard]] VideoCore::RendererBase& Renderer();