MINOR: Remove stale streams producer retry default docs. (#6844)

As part of #5425 the streams default override for producer retries was removed. The documentation was not updated to reflect that change.

Reviewers: Matthias J. Sax <mjsax@apache.org>, Sophie Blee-Goldman <sophie@confluent.io>,  Bill Bejeck <bbejeck@gmail.com>

docs/streams/developer-guide/config-streams.html

@@ -658,11 +658,7 @@
               <td>Consumer</td>
               <td>1000</td>
             </tr>
-            <tr class="row-odd"><td>retries</td>
-              <td>Producer</td>
-              <td>10</td>
-            </tr>
-            <tr class="row-even"><td>rocksdb.config.setter</td>
+            <tr class="row-odd"><td>rocksdb.config.setter</td>
               <td>Consumer</td>
               <td>&nbsp;</td>
             </tr>