Wasi does not need libc

Small Cargo.toml nit that got missed in rust-random#64

Author: josephlr

Cargo.toml

@@ -25,7 +25,7 @@ cfg-if = "0.1"
 compiler_builtins = { version = "0.1", optional = true }
 core = { version = "1.0", optional = true, package = "rustc-std-workspace-core" }
 
-[target.'cfg(any(unix, target_os = "redox", target_os = "wasi"))'.dependencies]
+[target.'cfg(any(unix, target_os = "redox"))'.dependencies]
 libc = { version = "0.2.60", default-features = false }
 
 [target.'cfg(target_os = "wasi")'.dependencies]