wasmtime: Make rustix an unconditional dependency (#3675)

This is unconditionally used on aarch64 and otherwise trying to manage
the precise clause for making it conditional vs unconditional probably
isn't worth it.

Closes #3672

crates/jit/Cargo.toml

@@ -29,10 +29,10 @@ bincode = "1.2.1"
 winapi = { version = "0.3.8", features = ["winnt", "impl-default"] }
 
 [target.'cfg(target_os = "linux")'.dependencies]
-rustix = { version = "0.31.0", optional = true }
+rustix = "0.31.0"
 
 [features]
-jitdump = ['rustix']
+jitdump = []
 vtune = ['ittapi-rs']
 
 [badges]