SecurityConfig: remove unnecessary @configuration annotation.

@see https://jira.spring.io/browse/SEC-2788

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/support/spring/security/SecurityConfig.java

@@ -21,7 +21,6 @@
 import javax.servlet.http.HttpServletRequest;
 
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
 import org.springframework.context.ApplicationListener;
 import org.springframework.http.HttpMethod;
 
@@ -45,7 +44,6 @@
 import ru.mystamps.web.config.ServicesConfig;
 import ru.mystamps.web.Url;
 
-@Configuration
 @EnableWebMvcSecurity
 @EnableGlobalMethodSecurity(prePostEnabled = true)
 public class SecurityConfig extends WebSecurityConfigurerAdapter {