code: def cleanupBox(box):
      """Return a sparse copy of `box`, without redundant (default) values.
  
      >>> cleanupBox({})
      {}
      >>> cleanupBox({'wdth': (0.0, 1.0)})
      {'wdth': (0.0, 1.0)}
      >>> cleanupBox({'wdth': (-1.0, 1.0)})
      {}
  
      """
      return {
          tag: limit
          for tag, limit in box.items()
          if limit != (-1.0, 1.0)
      }
  
imports: from fontTools.misc.dictTools import hashdict
  from fontTools.misc.intTools import bit_count
  from fontTools.ttLib import newTable
  from fontTools.ttLib.tables import otTables
  from fontTools.ttLib.ttVisitor import TTVisitor
  from fontTools.otlLib.builder import buildLookup, buildSingleSubstSubtable
  from collections import OrderedDict
  from .errors import VarLibError, VarLibValidationError
label_desc: Use image node_id 6 for calling a global function with example usage: cleanupBox(box) and returns: unknown