drm/tegra: Remove two unused function declarations

Commit 776dc384 ("drm/tegra: Move subdevice infrastructure to host1x")
removed the implementation but not the declaration.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230809030226.3412-1-yuehaibing@huawei.com

drivers/gpu/drm/tegra/drm.h

@@ -120,9 +120,6 @@ int tegra_drm_unregister_client(struct tegra_drm *tegra,
 int host1x_client_iommu_attach(struct host1x_client *client);
 void host1x_client_iommu_detach(struct host1x_client *client);
 
-int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
-int tegra_drm_exit(struct tegra_drm *tegra);
-
 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova);
 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
 		    dma_addr_t iova);