Add ability to remove profile picture on Profile Settings (#538)

* Add ability to remove profile picture on Profile Settings

* Fix lint

* Fix according to review

server/src/core/auth/auth.resolver.ts

@@ -1,4 +1,4 @@
-import { Args, Mutation, Resolver, Query } from '@nestjs/graphql';
+import { Args, Mutation, Resolver } from '@nestjs/graphql';
 import { AuthTokens } from './dto/token.entity';
 import { TokenService } from './services/token.service';
 import { RefreshTokenInput } from './dto/refresh-token.input';