Remove redundant condition judgement in DirectoryScanner#scan

When i read the scan() of DirectoryScanner class in datanode, i found the following condition code could be more simplify and easy to understand.

DirectoryScanner.java

if (d < blockpoolReport.length) {
            // There may be multiple on-disk records for the same block, don't increment
            // the memory record pointer if so.
            ScanInfo nextInfo = blockpoolReport[Math.min(d, blockpoolReport.length - 1)];
            if (nextInfo.getBlockId() != info.getBlockId()) {
              ++m;
            }
} else {
            ++m;
 }

as described above code segmet, i find the code of d < blockpoolReport.length and the max of d is blockpoolReport.length-1, so that result of Math.min(d, blockpoolReport.length - 1) always is d, so i think needn't to get min value of scan index and length for blockpoolReport.

thanks!