math/superlu-dist: Fix fetch

Duplicate record somehow got into distinfo, and this caused fetch
failure.

Reported by:	fallout

math/superlu-dist/distinfo

 TIMESTAMP = 1661580599
 SHA256 (xiaoyeli-superlu_dist-v8.1.0_GH0.tar.gz) = 9308844b99a7e762d5704934f7e9f79daf158b0bfc582994303c2e0b31518b34
 SIZE (xiaoyeli-superlu_dist-v8.1.0_GH0.tar.gz) = 2297109
-SHA256 (xiaoyeli-superlu_dist-v8.1.0_GH0.tar.gz) = 9308844b99a7e762d5704934f7e9f79daf158b0bfc582994303c2e0b31518b34
-SIZE (xiaoyeli-superlu_dist-v8.1.0_GH0.tar.gz) = 2297109