去除多余引用，修正个别错误

src/main/java/com/genersoft/iot/vmp/gb28181/SipLayer.java

@@ -16,7 +16,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
-// import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.DependsOn;
 import org.springframework.stereotype.Component;