Remive special mock environment file

The mock is nw the default, the old dev file was of no use outside the 
setup project, so it is kept there now.

Makefile

@@ -19,9 +19,6 @@ test-unit:
 test-e2e:
 	docker-compose -f docker/docker-compose.yml exec -T testcenter-frontend-dev ng e2e --webdriver-update=false --port 4202 -c e2e
 
-init-dev-mock-config:
-	cp src/environments/environment.dev.mock.ts src/environments/environment.ts
-
 init-dev-config:
 	cp src/environments/environment.dev.ts src/environments/environment.ts
 

src/environments/environment.dev.mock.ts

-export const environment = {
-  production: false,
-  testcenterUrl: 'http://localhost:8000/',
-  appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
-  apiVersionExpected: '9.1.0',
-  veronaApiVersionSupported: '2.1.0'
-};

src/environments/environment.dev.ts

 export const environment = {
   production: false,
-  testcenterUrl: '/api/',
+  testcenterUrl: 'http://localhost:8000/',
   appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
   apiVersionExpected: '9.1.0',
   veronaApiVersionSupported: '2.1.0'