Revert "Use Fx* variants of HashMap and HashSet everywhere in Zed" (#7492)

Reverts zed-industries/zed#7481

This would regress performance because we'd be using the standard
library's hash maps everywhere, so reverting for now.

crates/terminal/src/terminal.rs

@@ -30,7 +30,6 @@ use mappings::mouse::{
     scroll_report,
 };
 
-use collections::{HashMap, VecDeque};
 use procinfo::LocalProcessInfo;
 use serde::{Deserialize, Serialize};
 use settings::Settings;
@@ -40,6 +39,7 @@ use util::truncate_and_trailoff;
 
 use std::{
     cmp::{self, min},
+    collections::{HashMap, VecDeque},
     fmt::Display,
     ops::{Deref, Index, RangeInclusive},
     os::unix::prelude::AsRawFd,