Clean up deps for file_finder, language_selector, task, rpc, storybook (#8353)

Following-up on #8330

Invocation
```bash
cargo-machete --with-metadata --skip-target-dir --fix
````

There is more stuff to fix, but it chokes on `async-lock`:
```
cargo-machete found the following unused dependencies in /x/Code/zed:
rpc -- /x/Code/zed/crates/rpc/Cargo.toml:
        async_lock
        prost_build
        serde_derive
Error: Dependency async_lock not found
```

Release Notes:
- N/A

crates/rpc/Cargo.toml

@@ -18,7 +18,6 @@ anyhow.workspace = true
 async-lock = "2.4"
 async-tungstenite = "0.16"
 base64 = "0.13"
-clock.workspace = true
 collections.workspace = true
 futures.workspace = true
 gpui = { workspace = true, optional = true }
@@ -29,7 +28,6 @@ rsa = "0.4"
 serde.workspace = true
 serde_derive.workspace = true
 serde_json.workspace = true
-smol-timeout = "0.6"
 strum.workspace = true
 tracing = { version = "0.1.34", features = ["log"] }
 util.workspace = true
@@ -39,9 +37,6 @@ zstd = "0.11"
 prost-build = "0.9"
 
 [dev-dependencies]
-collections = { workspace = true, features = ["test-support"] }
-ctor.workspace = true
+collections.workspace = true
 env_logger.workspace = true
-gpui = { workspace = true, features = ["test-support"] }
-smol.workspace = true
-tempfile.workspace = true
+gpui.workspace = true