code: def teardown(self, size, implementation, matrix_type):
      os.unlink(self.filename)
  
imports: from .common import set_mem_rlimit, run_monitored, get_mem_info
  from io import BytesIO, StringIO
  import os
  import tempfile
  import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 4 for calling the MemUsage obj's underlying member method code with example usage: obj.teardown(size, implementation, matrix_type) without return types