Use std::collections::HashMap instead of hashbrown::HashMap

* This should not have any effect as the std::collections::HashMap
  is backed by hashbrown::HashMap and we do not do specific stuffs
  with it.

Co-authored-by:	Emmanuel Bosquet <emmanuel.bosquet@clever-cloud.com>
Signed-off-by: Florentin Dubois <florentin.dubois@clever-cloud.com>

lib/Cargo.toml

@@ -26,7 +26,6 @@ include = [
 [dependencies]
 cookie-factory = "^0.3.2"
 foreign-types-shared = "^0.1.1"
-hashbrown = "^0.12.2"
 hdrhistogram = "^7.5.0"
 hpack = "^0.3.0"
 idna = "^0.2.3"

lib/src/lib.rs

@@ -166,7 +166,6 @@ extern crate url;
 #[macro_use]
 extern crate sozu_command_lib as sozu_command;
 extern crate cookie_factory;
-extern crate hashbrown;
 extern crate hpack;
 extern crate idna;
 extern crate lazycell;

lib/src/router/pattern_trie.rs

@@ -1,6 +1,5 @@
-use std::{fmt::Debug, iter, str};
+use std::{collections::HashMap, fmt::Debug, iter, str};
 
-use hashbrown::HashMap;
 use regex::bytes::Regex;
 
 pub type Key = Vec<u8>;
@@ -790,6 +789,6 @@ mod tests {
 
     #[test]
     fn size() {
-        assert_size!(TrieNode<u32>, 152);
+        assert_size!(TrieNode<u32>, 136);
     }
 }

lib/src/router/trie.rs

@@ -1,6 +1,4 @@
-use std::{fmt::Debug, iter, str};
-
-use hashbrown::HashMap;
+use std::{collections::HashMap, fmt::Debug, iter, str};
 
 pub type Key = Vec<u8>;
 pub type KeyValue<K, V> = (K, V);
@@ -707,6 +705,6 @@ mod tests {
 
     #[test]
     fn size() {
-        assert_size!(TrieNode<u32>, 128);
+        assert_size!(TrieNode<u32>, 112);
     }
 }