Remove unused ids query parameter from GET /extensions endpoint (#13802)

This PR removes the `ids` query parameter from the `GET /extensions`
endpoint, as we don't use it.

We originally added the query parameter in #9929 to facilitate
auto-updates. However, it was superseded by the `GET
/extensions/updates` endpoint in #10052.

There shouldn't be any Zed versions out in the wild that are using the
`ids` query parameter, as we added the endpoint on Thursday, March 28,
and replaced its usage with the new endpoint on Monday, April 1, before
the next Zed release.

Release Notes:

- N/A

crates/collab/src/api/extensions.rs

@@ -36,8 +36,6 @@ pub fn router() -> Router {
 struct GetExtensionsParams {
     filter: Option<String>,
     #[serde(default)]
-    ids: Option<String>,
-    #[serde(default)]
     max_schema_version: i32,
 }
 
@@ -45,27 +43,16 @@ async fn get_extensions(
     Extension(app): Extension<Arc<AppState>>,
     Query(params): Query<GetExtensionsParams>,
 ) -> Result<Json<GetExtensionsResponse>> {
-    let extension_ids = params
-        .ids
-        .as_ref()
-        .map(|s| s.split(',').map(|s| s.trim()).collect::<Vec<_>>());
-
-    let extensions = if let Some(extension_ids) = extension_ids {
-        app.db.get_extensions_by_ids(&extension_ids, None).await?
-    } else {
-        let result = app
+    let extensions = app
         .db
         .get_extensions(params.filter.as_deref(), params.max_schema_version, 500)
         .await?;
 
     if let Some(query) = params.filter.as_deref() {
-            let count = result.len();
+        let count = extensions.len();
         tracing::info!(query, count, "extension_search")
     }
 
-        result
-    };
-
     Ok(Json(GetExtensionsResponse { data: extensions }))
 }