make registration form static (#147)

- removed fetch registration call from register page
- removed unused state variables
- moved few hardcoded links to env variables

VAN-369

src/register/data/service.js

@@ -24,26 +24,6 @@ export async function registerRequest(registrationInformation) {
   };
 }
 
-export async function getRegistrationForm() {
-  const requestConfig = {
-    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
-    isPublic: true,
-  };
-
-  const { data } = await getAuthenticatedHttpClient()
-    .get(
-      `${getConfig().LMS_BASE_URL}/user_api/v2/account/registration/`,
-      requestConfig,
-    )
-    .catch((e) => {
-      throw (e);
-    });
-
-  return {
-    registrationForm: data,
-  };
-}
-
 export async function getFieldsValidations(formPayload) {
   const requestConfig = {
     headers: { 'Content-Type': 'application/x-www-form-urlencoded' },