test: remove async bypass handling from proxy options

the router does not allow sending data the way bypass did. In the router we only have the req object, so this test is removed since it is invalid (https://github.com/chimurai/http-proxy-middleware/blob/6436ffc522a3a2485c198bd2fb544db0e33e3821/src/router.ts#L7)

Author: bjohansebas

test/server/proxy-option.test.js

@@ -41,19 +41,6 @@ const proxyOptionPathsAsProperties = [
       }
     },
   },
-  {
-    context: "/proxy/async",
-    bypass(req, res) {
-      if (/\/proxy\/async$/.test(req.path || req.url)) {
-        return new Promise((resolve) => {
-          setTimeout(() => {
-            res.end("proxy async response");
-            resolve(true);
-          }, 10);
-        });
-      }
-    },
-  },
   {
     context: "/bypass-with-target",
     target: `http://localhost:${port1}`,
@@ -295,13 +282,6 @@ describe("proxy option", () => {
         expect(response.status).toBe(404);
       });
 
-      it("should wait if bypass returns promise", async () => {
-        const response = await req.get("/proxy/async");
-
-        expect(response.status).toBe(200);
-        expect(response.text).toContain("proxy async response");
-      });
-
       it("should work with the 'target' option", async () => {
         const response = await req.get("/bypass-with-target/foo.js");