Fix e2e tests

There's no need to wrap the args for ocamllsp/switchImplIntf. The client
already does this.

Signed-off-by: Rudi Grinberg <[email protected]>

Author: rgrinberg

ocaml-lsp-server/test/e2e/__tests__/ocamllsp-switchImplIntf.ts

@@ -18,7 +18,7 @@ describe("ocamllsp/switchImplIntf", () => {
   async function ocamllspSwitchImplIntf(
     documentUri: DocumentUri,
   ): Promise<Array<DocumentUri>> {
-    return languageServer.sendRequest("ocamllsp/switchImplIntf", [documentUri]);
+    return languageServer.sendRequest("ocamllsp/switchImplIntf", documentUri);
   }
 
   let testWorkspacePath = path.join(__dirname, "..", "test_files/");