Use Fx* variants of HashMap and HashSet everywhere in Zed (#7481)

Release Notes:

- N/A

crates/zed/src/open_listener.rs

@@ -1,6 +1,7 @@
 use anyhow::{anyhow, Context, Result};
 use cli::{ipc, IpcHandshake};
 use cli::{ipc::IpcSender, CliRequest, CliResponse};
+use collections::HashMap;
 use editor::scroll::Autoscroll;
 use editor::Editor;
 use futures::channel::mpsc::{UnboundedReceiver, UnboundedSender};
@@ -10,7 +11,6 @@ use gpui::{AppContext, AsyncAppContext, Global};
 use itertools::Itertools;
 use language::{Bias, Point};
 use release_channel::parse_zed_link;
-use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::os::unix::prelude::OsStrExt;
 use std::path::Path;
@@ -176,7 +176,7 @@ pub async fn handle_cli_connection(
     if let Some(request) = requests.next().await {
         match request {
             CliRequest::Open { paths, wait } => {
-                let mut caret_positions = HashMap::new();
+                let mut caret_positions = HashMap::default();
 
                 let paths = if paths.is_empty() {
                     workspace::last_opened_workspace_paths()

crates/zed/src/zed.rs

@@ -733,6 +733,7 @@ fn open_settings_file(
 mod tests {
     use super::*;
     use assets::Assets;
+    use collections::HashSet;
     use editor::{scroll::Autoscroll, DisplayPoint, Editor};
     use gpui::{
         actions, Action, AnyWindowHandle, AppContext, AssetSource, Entity, TestAppContext,
@@ -742,10 +743,7 @@ mod tests {
     use project::{project_settings::ProjectSettings, Project, ProjectPath};
     use serde_json::json;
     use settings::{handle_settings_file_changes, watch_config_file, SettingsStore};
-    use std::{
-        collections::HashSet,
-        path::{Path, PathBuf},
-    };
+    use std::path::{Path, PathBuf};
     use theme::{ThemeRegistry, ThemeSettings};
     use workspace::{
         item::{Item, ItemHandle},