MOSU chore: Remove staging URL from CORS configuration

Author: wlgns12370

src/main/java/life/mosu/mosuserver/global/config/SecurityConfig.java

@@ -52,8 +52,7 @@ public class SecurityConfig {
             "https://www.mosuedu.com",
             "https://partnership.mosuedu.com",
             "https://admin.mosuedu.com",
-            "http://dev.mosuedu.com:3000",
-            "http://staging.mosuedu.com"
+            "http://dev.mosuedu.com:3000"
     );
     private final OAuthUserService userService;
     private final OAuth2LoginSuccessHandler loginSuccessHandler;

src/main/java/life/mosu/mosuserver/global/config/WebMvcConfig.java

@@ -34,8 +34,7 @@ public void addCorsMappings(CorsRegistry registry) {
                         "https://www.mosuedu.com",
                         "https://partnership.mosuedu.com",
                         "https://admin.mosuedu.com",
-                        "http://dev.mosuedu.com:3000",
-                        "http://staging.mosuedu.com"
+                        "http://dev.mosuedu.com:3000"
                 )
                 .allowCredentials(true)
                 .maxAge(3600);