This change broke some things I'm not ready to fix.
This change broke some things I'm not ready to fix.

Revert "External Replicate ought to produce unique arrays."

This reverts commit 9e4cf8d18df13fa959a9b14ca006c985fb8ae819.

HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,mrakgr/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,ihc/futhark,CulpaBS/wbBach,diku-dk/futhark,mrakgr/futhark,mrakgr/futhark,ihc/futhark