[I] [Enhancement] Remove the redundant code [rocketmq]

[via GitHub]

wyyl1 opened a new issue, #7785:
URL: https://github.com/apache/rocketmq/issues/7785

   ### Before Creating the Enhancement Request
   
   - [X] I have confirmed that this should be classified as an enhancement 
rather than a bug/feature.
   
   
   ### Summary
   
   Remove the redundant code because Math.abs does not return negative numbers
   
   ### Motivation
   
   Make the code clean
   
   ### Describe the Solution You'd Like
   
   ## Remove the redundant code
   
   ### source code
   
   ```java
   public void reset() {
       int index = Math.abs(random.nextInt(Integer.MAX_VALUE));
       if (index < 0) {
           index = 0;
       }
       this.threadLocalIndex.set(index);
   }
   ```
   
   ### redundant code
   
   ```java
   if (index < 0) {
       index = 0;
   }
   ```
   
   ### Describe Alternatives You've Considered
   
   none
   
   ### Additional Context
   
   _No response_


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