Remove dead-code removal when inlining in copy/constant propagator.
Remove dead-code removal when inlining in copy/constant propagator.

A later pass does this anyway (although I might remove that too).

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