nvidia_legacy_340: Remove unneeded/failing patch

The patch is not applying and no longer needed after upgrade in
045575e7. Now the same result is
achieved by the following lines in the driver package itself:

    #if defined(NV_DRM_LEGACY_PCI_INIT_PRESENT)
    #define nv_drm_pci_init drm_legacy_pci_init
    #define nv_drm_pci_exit drm_legacy_pci_exit
    #else
    #define nv_drm_pci_init drm_pci_init
    #define nv_drm_pci_exit drm_pci_exit
    #endif