Remove debugging trace from code generator.
Remove debugging trace from code generator.

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