修复关闭按需拉流无效的问题

dengming

2022-03-10 bef7fb2440093bbf92a2d192ce1f1c4db219b07c

 src/main/java/com/genersoft/iot/vmp/gb28181/session/SsrcConfig.java

@@ -81,7 +81,6 @@
            isUsed.remove(sn);
            notUsed.add(sn);
        }catch (NullPointerException e){
            System.out.printf("11111");
        }
    }