Remove unused binding.
Remove unused binding.

diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,ihc/futhark,HIPERFIT/futhark,ihc/futhark