{AH} minor cleanup of unused variables and missing types
{AH} minor cleanup of unused variables and missing types

pysam-developers/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,pysam-developers/pysam