Update impl.md -- Remove duplicated sentence

I believe item (3) encapsulates item (2) under the "Level 0" heading. If I have misunderstood, please consider clarifying the text. Thanks!
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Nevil George 2019-12-12 13:39:23 +01:00 committed by GitHub
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@ -70,9 +70,8 @@ Create a brand new memtable and log file and direct future updates here.
In the background: In the background:
1. Write the contents of the previous memtable to an sstable. 1. Write the contents of the previous memtable to an sstable.
2. Discard the memtable. 2. Delete the old log file and the old memtable.
3. Delete the old log file and the old memtable. 3. Add the new sstable to the young (level-0) level.
4. Add the new sstable to the young (level-0) level.
## Compactions ## Compactions