chore: 불필요한 import 제거

Author: Gyuhyeok99

src/main/java/com/example/solidconnection/auth/controller/AuthController.java

@@ -27,7 +27,6 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.Authentication;
 import org.springframework.web.bind.annotation.DeleteMapping;
-import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;