All api calls from tests use same chaiHttp implementation

Removes a list of fetch alternatives after being replaced by chaiHttp:
 - request
 - request-promise
 - supertest
 - supertest-as-promised

tests/system/asAUserIWantAForbiddenErrorIfTheTokenIsMalformed.js

@@ -1,17 +1,26 @@
-const request = require("supertest-as-promised");
-const app = require("../../src/webserver/app");
+const assert = require("assert");
+const chai = require("chai");
+const chaiHttp = require("chai-http");
+
+const server = require("../../src/webserver/server");
 const resetDatabase = require("../helpers/resetDatabase");
 // const assert = require("assert");
+chai.use(chaiHttp);
 
 describe("As a user I want a forbidden error if the token is malformed", () => {
   beforeEach(() => resetDatabase());
 
-  it("should return 401", () =>
-    request(app)
+  it("should return 401", done => {
+    chai
+      .request(server)
       .get("/api/v1/user/settings")
       .set("Authorization", "maLfOrMed TOKEN")
-      .expect(401));
+      .end((error, response) => {
+        assert.equal(response?.status, 401);
+        done();
+      });
+  });
   // .then(response => {
   //   assert.equal(response.body.error, "You must be logged in.");
-  // }));
+  // }));}
 });