Polish github links

pom.xml

@@ -101,7 +101,6 @@
             <id>stevenschew</id>
             <name>Wei Zhou</name>
             <email>stevenschew@@apache.org</email>
-            <url>https://github.com/stevenschew</url>
             <roles>
                 <role>committer</role>
             </roles>
@@ -111,7 +110,6 @@
             <id>lollipop</id>
             <name>Jixiang Jin</name>
             <email>lollipop@apache.org</email>
-            <url>https://github.com/lollipopjin</url>
             <roles>
                 <role>committer</role>
             </roles>
@@ -121,7 +119,6 @@
             <id>lizhanhui</id>
             <name>Zhanhui Li</name>
             <email>lizhanhui@apache.org</email>
-            <url>https://github.com/lizhanhui</url>
             <roles>
                 <role>committer</role>
             </roles>

store/src/main/java/org/apache/rocketmq/store/StoreCheckpoint.java

@@ -105,7 +105,6 @@ public class StoreCheckpoint {
     public long getMinTimestamp() {
         long min = Math.min(this.physicMsgTimestamp, this.logicsMsgTimestamp);
 
-        // fixed https://github.org/apache/rocketmqissues/467
         min -= 1000 * 3;
         if (min < 0)
             min = 0;