remove unused signup components

src/app/app-routing.module.ts

src/app/login/login.component.html

src/app/signup/core/registration.model.ts

src/app/signup/core/registration.service.ts

src/app/signup/signup-routing.module.ts

src/app/signup/signup.module.ts

src/app/signup/student-signup-two/signup-page.component.html

src/app/signup/student-signup-two/signup-page.component.scss

...p/signup/student-signup-two/signup-page.component.spec.ts

src/app/signup/student-signup-two/signup-page.component.ts

src/app/signup/tutor-signup/signup-tuteur.component.html

src/app/signup/tutor-signup/signup-tuteur.component.scss

src/app/signup/tutor-signup/signup-tuteur.component.spec.ts

src/app/signup/tutor-signup/signup-tuteur.component.ts

src/environments/environment.local.ts