Remove solar system override for HSC.

Turning off solar system association in the dev cluter is no longer
necessary, and in fact we have demonstrated that solar system
association works for mock visits as long as the ephemerides service is
loaded with the original observations' dates (*not* the dates of the
test, as originally assumed).

pipelines/HSC/ApPipe.yaml

@@ -7,8 +7,3 @@ imports:
 parameters:
   # Use dataset's specific templates
   coaddName: goodSeeing
-tasks:
-  diaPipe:
-    class: lsst.ap.association.DiaPipelineTask
-    config:
-      doSolarSystemAssociation: false  # No "known objects" catalog for fake visits