remove Ax from cw12 regression test documentation
@@ -59,6 +59,6 @@ These three commits establish the new regression testing infrastructure with the
+ [Experiments on Gov2](experiments-gov2.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30}
+ [Experiments on ClueWeb09 (Category B)](experiments-cw09b.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30, NDCG@20, ERR@20}
+ [Experiments on ClueWeb12-B13](experiments-cw12b13.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30, NDCG@20, ERR@20}
-+ [Experiments on ClueWeb12](experiments-cw12.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30, NDCG@20, ERR@20}
++ [Experiments on ClueWeb12](experiments-cw12.md): {BM25, QL} &#10799; {RM3} &#10799; {AP, P30, NDCG@20, ERR@20}
+ [Experiments on Tweets2011 (MB11 &amp; MB12)](experiments-mb11.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30}
+ [Experiments on Tweets2013 (MB13 &amp; MB14)](experiments-mb13.md): {BM25, QL} &#10799; {RM3, Ax} &#10799; {AP, P30}
