cargo: Remove last traces of webdriver from libservo (#38314)

The feature which enables optional dependency & function is never used
and can be safely removed.

Testing: It can still builds.

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

Cargo.lock

@@ -4924,7 +4924,6 @@ dependencies = [
  "surfman",
  "tracing",
  "url",
- "webdriver_server",
  "webgl",
  "webgpu",
  "webrender",

components/servo/Cargo.toml

@@ -44,7 +44,6 @@ tracing = [
     "profile_traits/tracing",
     "script/tracing",
 ]
-webdriver = ["webdriver_server"]
 webgl_backtrace = [
     "script/webgl_backtrace",
     "webgl/webgl_backtrace",
@@ -117,7 +116,6 @@ stylo_traits = { workspace = true }
 surfman = { workspace = true }
 tracing = { workspace = true, optional = true }
 url = { workspace = true }
-webdriver_server = { path = "../webdriver_server", optional = true }
 webgpu = { path = "../webgpu" }
 webrender = { workspace = true }
 webrender_api = { workspace = true }

components/servo/lib.rs

@@ -135,11 +135,6 @@ pub use crate::webview_delegate::{
     PermissionRequest, SelectElement, WebResourceLoad, WebViewDelegate,
 };
 
-#[cfg(feature = "webdriver")]
-fn webdriver(port: u16, constellation: Sender<EmbedderToConstellationMessage>) {
-    webdriver_server::start_server(port, constellation);
-}
-
 #[cfg(feature = "media-gstreamer")]
 mod media_platform {
     #[cfg(any(windows, target_os = "macos"))]

ports/servoshell/Cargo.toml

@@ -48,7 +48,6 @@ refcell_backtrace = ["libservo/refcell_backtrace"]
 tracing = ["dep:tracing", "dep:tracing-subscriber", "libservo/tracing"]
 tracing-hitrace = ["tracing", "dep:hitrace"]
 tracing-perfetto = ["tracing", "dep:tracing-perfetto"]
-webdriver = ["libservo/webdriver"]
 webgl_backtrace = ["libservo/webgl_backtrace"]
 webgpu = ["libservo/webgpu"]
 webxr = ["libservo/webxr"]