refactor: remove more unneeded backward.py shims

Gone are:

- iitems
- litems
- iternext
- to_bytes
- to_string
- binary_bytes
- byte_to_int
- bytes_to_ints
- BUILTINS

1 files changed, 1 insertions, 2 deletions

diff --git a/tests/test_execfile.py b/tests/test_execfile.py
index 3cdd1ed9..ec8cd180 100644
--- a/tests/test_execfile.py
+++ b/tests/test_execfile.py
@@ -14,7 +14,6 @@ import sys
 import pytest
 
 from coverage import env
-from coverage.backward import binary_bytes
 from coverage.execfile import run_python_file, run_python_module
 from coverage.files import python_reported_file
 from coverage.misc import NoCode, NoSource
@@ -151,7 +150,7 @@ class RunPycFileTest(CoverageTest):
         # Jam Python 2.1 magic number into the .pyc file.
         with open(pycfile, "r+b") as fpyc:
             fpyc.seek(0)
-            fpyc.write(binary_bytes([0x2a, 0xeb, 0x0d, 0x0a]))
+            fpyc.write(bytes([0x2a, 0xeb, 0x0d, 0x0a]))
 
         with pytest.raises(NoCode, match="Bad magic number in .pyc file"):
             run_python_file([pycfile])