Move delete on create into repo as it's a neo4j impl detail

Author: CarsonF

src/components/user/known-language.repository.ts

@@ -13,6 +13,8 @@ export class KnownLanguageRepository extends DtoRepository(KnownLanguage) {
     languageId,
     languageProficiency,
   }: ModifyKnownLanguageArgs) {
+    await this.delete({ userId, languageId, languageProficiency });
+
     await this.db
       .query()
       .matchNode('user', 'User', { id: userId })

src/components/user/user.service.ts

@@ -303,7 +303,6 @@ export class UserService {
   }
 
   async createKnownLanguage(args: ModifyKnownLanguageArgs) {
-    await this.knownLanguages.delete(args);
     await this.knownLanguages.create(args);
   }