fix: correct type definition for the global BackendConfiguration type - there is no checkCertificate field

This field never existed in the released version of our Backend implementation, it is a remnant of a previous approach I was taking, I somehow forgot to remove the tests and type definition

Author: Jake Champion

integration-tests/js-compute/fixtures/app/src/dynamic-backend.js

@@ -1287,28 +1287,6 @@ routes.set("/backend/timeout", async () => {
       });
     }
 
-    // checkCertificate property
-    {
-      routes.set("/backend/constructor/parameter-checkCertificate-property-valid-boolean", async () => {
-        const types = [{}, [], Symbol(), 1, "2"];
-        for (const type of types) {
-          let error = assertDoesNotThrow(() => {
-            new Backend({ name: 'checkCertificate-property-valid-boolean' + String(type), target: 'a', checkCertificate: type })
-          })
-          if (error) { return error }
-        }
-        let error = assertDoesNotThrow(() => {
-          new Backend({ name: 'checkCertificate-property-valid-boolean-true', target: 'a', checkCertificate: true })
-        })
-        if (error) { return error }
-        error = assertDoesNotThrow(() => {
-          new Backend({ name: 'checkCertificate-property-valid-boolean-false', target: 'a', checkCertificate: false })
-        })
-        if (error) { return error }
-        return pass('ok')
-      });
-    }
-
     // caCertificate property
     {
       routes.set("/backend/constructor/parameter-caCertificate-property-empty-string", async () => {

integration-tests/js-compute/fixtures/app/tests.json

@@ -2736,17 +2736,6 @@
       "body": "ok"
     }
   },
-  "GET /backend/constructor/parameter-checkCertificate-property-valid-boolean": {
-    "environments": ["viceroy"],
-    "downstream_request": {
-      "method": "GET",
-      "pathname": "/backend/constructor/parameter-checkCertificate-property-valid-boolean"
-    },
-    "downstream_response": {
-      "status": 200,
-      "body": "ok"
-    }
-  },
   "GET /backend/constructor/parameter-caCertificate-property-empty-string": {
     "environments": ["viceroy"],
     "downstream_request": {

test-d/.test-d.ts

@@ -97,7 +97,6 @@ import { expectError, expectType } from 'tsd';
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', tlsMinVersion: 1.2,}))
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', tlsMaxVersion: 1.2,}))
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', certificateHostname: 'example.com',}))
-  expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', checkCertificate: false,}))
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', caCertificate: '',}))
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com', ciphers: 'DEFAULT',}))
   expectType<Backend>(new Backend({name: 'eu', target: 'www.example.com',  sniHostname: 'example.com',}))

types/globals.d.ts

@@ -90,11 +90,6 @@ declare interface BackendConfiguration {
    * Define the hostname that the server certificate should declare.
    */
   certificateHostname?: string,
-  /**
-   * Whether or not to validate the server certificate.
-   * Highly recommended to enable this if `useSSL` is set to `true`.
-   */
-  checkCertificate?: boolean,
   /**
    * The CA certificate to use when checking the validity of the backend.
    */