web/src/main/java/org/springframework/security/web/csrf/CsrfLogoutHandler.java
public void logout(HttpServletRequest request, HttpServletResponse response,
			Authentication authentication) {
		this.csrfTokenRepository.saveToken(null, request, response);
	}
public void logout(HttpServletRequest request, HttpServletResponse response,
			Authentication authentication) {
		this.csrfTokenRepository.saveToken(null, request, response);
	}
Clears the {@link CsrfToken}

@see org.springframework.security.web.authentication.logout.LogoutHandler#logout(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse,
org.springframework.security.core.Authentication)