Remove unused dependencies and avoid instantiating FontCache in tests

zed/src/workspace/mod.rs

@@ -53,7 +53,7 @@ fn open_paths(params: &OpenParams, app: &mut MutableAppContext) {
 mod tests {
     use super::*;
     use crate::{settings, test::*};
-    use gpui::{App, FontCache};
+    use gpui::App;
     use serde_json::json;
 
     #[test]

zed/src/workspace/workspace_view.rs

@@ -325,7 +325,7 @@ mod tests {
     use super::{pane, Workspace, WorkspaceView};
     use crate::{settings, test::temp_tree, workspace::WorkspaceHandle as _};
     use anyhow::Result;
-    use gpui::{App, FontCache};
+    use gpui::App;
     use serde_json::json;
 
     #[test]