Delete DemoController.java

src/main/java/hdm/mi/growbros/controllers/DemoController.java

-package hdm.mi.growbros.controllers;
-
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/api/v1/demo-controller")
-public class DemoController {
-    @GetMapping
-    public ResponseEntity<String> sayHello() {
-        return ResponseEntity.ok("Hello from secured endpoint.");
-    }
-}