unneeded change

Author: arthurpassos

tests/config/config.d/clusters.xml

@@ -3,23 +3,6 @@
         <!-- Remove the default remote server to avoid people depending on its hardcoded config
              Use test_shard_localhost instead -->
         <default remove="remove"></default>
-        <test_three_replicas>
-            <shard>
-                <internal_replication>false</internal_replication>
-                <replica>
-                    <host>127.0.0.1</host>
-                    <port>9000</port>
-                </replica>
-                <replica>
-                    <host>127.0.0.1</host>
-                    <port>9100</port>
-                </replica>
-                <replica>
-                    <host>127.0.0.1</host>
-                    <port>9200</port>
-                </replica>
-            </shard>
-        </test_three_replicas>
         <test_shard_localhost>
             <shard>
                 <replica>