refactor: remove hashbrown deps since we can use std

Author: shogo-nakano-desu

Cargo.lock

@@ -17,7 +17,6 @@ backtrace = { version = "0.3.67", optional = true }
 always-assert = { version = "0.1.2", features = ["log"] }
 jod-thread = "0.1.2"
 crossbeam-channel = "0.5.5"
-hashbrown = { version = "0.14.0" }
 # Think twice before adding anything here
 
 [target.'cfg(windows)'.dependencies]

crates/stdx/Cargo.toml

@@ -15,10 +15,6 @@
 //! - **std** (default, *enabled* in this build):
 //!   an implementation using `std::collections::hash_map`, placed in the crate root
 //!   (e.g. `anymap::AnyMap`).
-//!
-//! - **hashbrown** (optional; *enabled* in this build):
-//!   an implementation using `alloc` and `hashbrown::hash_map`, placed in a module `hashbrown`
-//!   (e.g. `anymap::hashbrown::AnyMap`).
 
 #![warn(missing_docs, unused_results)]