Revert "Fix position query for probes."
Revert "Fix position query for probes."

This reverts commit 2b242afb153555a99bcefa96b9c26d607a7fc0ad.

ucscXena/ucsc-xena-client,acthp/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,acthp/ucsc-xena-client,acthp/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client