Add configuration only for poc

src/main/java/uk/gov/hmcts/ccd/customheaders/UserAuthHeadersInterceptorConfig.java

@@ -2,10 +2,9 @@
 
 import feign.Retryer;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
 import uk.gov.hmcts.ccd.data.SecurityUtils;
 
-@Configuration
+
 public class UserAuthHeadersInterceptorConfig {
 
     @Bean