Make vfio-bindings available from third-party/rust

Summary: Make vfio-bindings available from third-party/rust again so that we only need to fork vfio_user to fbcode and add vfio-bindings as dependency from third party code.

Reviewed By: loganwendholt, dtolnay

Differential Revision: D68579169

fbshipit-source-id: 3f87e19b02ce0e7081d9f7070d62b33c773d7c3b

Cargo.toml

@@ -21,9 +21,6 @@ uefisettings = { git = "https://github.com/linuxboot/uefisettings", rev = "f16da
 uefisettings_backend_thrift = { git = "https://github.com/linuxboot/uefisettings", rev = "f16daed1d2bd1216204fd24e876c6477d03aebb3" }
 warp = { git = "https://github.com/jdthomas/warp.git", rev = "c794232d182abaa3add8184e7d661e084cc516c5", features = ["tls"] }
 
-[patch."https://github.com/rust-vmm/vfio"]
-vfio-bindings = "0.3.1"
-
 [workspace]
 members = [
   "shed/abomonable_string",