Remove the wasmtime-rust host from this repository (#439)

This bindings generator has been moved to the `wasmtime` crate upstream
as part of bytecodealliance/wasmtime#5317.
This is another step along the road of #395. The Wasmtime-hosted tests
are all removed here as well but may get re-added in the future for
testing as necessary.

Author: alexcrichton

Cargo.lock

@@ -39,11 +39,9 @@ wit-bindgen-gen-guest-c = { path = 'crates/gen-guest-c', version = '0.3.0' }
 wit-bindgen-gen-guest-rust = { path = "crates/gen-guest-rust", version = "0.3.0" }
 wit-bindgen-gen-guest-teavm-java = { path = 'crates/gen-guest-teavm-java', version = '0.3.0' }
 wit-bindgen-gen-host-js = { path = 'crates/gen-host-js', version = '0.3.0' }
-wit-bindgen-gen-host-wasmtime-rust = { path = 'crates/gen-host-wasmtime-rust', version = '0.3.0' }
 wit-bindgen-gen-markdown = { path = 'crates/gen-markdown', version = '0.3.0' }
 wit-bindgen-gen-rust-lib = { path = 'crates/gen-rust-lib', version = '0.3.0' }
 wit-bindgen-guest-rust = { path = 'crates/guest-rust', version = '0.3.0', default-features = false }
-wit-bindgen-host-wasmtime-rust = { path = 'crates/host-wasmtime-rust', version = '0.3.0' }
 wit-bindgen-rust-macro-shared = { path = 'crates/rust-macro-shared', version = '0.3.0' }
 
 [[bin]]
@@ -55,7 +53,6 @@ anyhow = { workspace = true }
 clap = { workspace = true }
 wit-bindgen-core = { path = 'crates/bindgen-core' }
 wit-bindgen-gen-guest-rust = { path = 'crates/gen-guest-rust', features = ['clap'] }
-wit-bindgen-gen-host-wasmtime-rust = { path = 'crates/gen-host-wasmtime-rust', features = ['clap'] }
 wit-bindgen-gen-host-js = { path = 'crates/gen-host-js', features = ['clap'] }
 wit-bindgen-gen-guest-c = { path = 'crates/gen-guest-c', features = ['clap'] }
 wit-bindgen-gen-markdown = { path = 'crates/gen-markdown', features = ['clap'] }