removing unused import

Author: ulisseslima

spring-security-modules/spring-security-web-login-2/src/main/java/com/baeldung/loginextrafieldscustom/SecurityConfig.java

@@ -16,7 +16,6 @@
 import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
 import org.springframework.security.web.context.HttpSessionSecurityContextRepository;
-import org.springframework.security.web.savedrequest.HttpSessionRequestCache;
 
 @EnableWebSecurity
 @PropertySource("classpath:/application-extrafields.properties")