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, 2 insertions, 3 deletions

diff --git a/coverage/misc.py b/coverage/misc.py
index 148f42e1..7182d385 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -16,7 +16,6 @@ import sys
 import types
 
 from coverage import env
-from coverage.backward import to_bytes
 
 ISOLATED_MODULES = {}
 
@@ -203,7 +202,7 @@ class Hasher(object):
 
     def update(self, v):
         """Add `v` to the hash, recursively if needed."""
-        self.md5.update(to_bytes(str(type(v))))
+        self.md5.update(str(type(v)).encode("utf8"))
         if isinstance(v, str):
             self.md5.update(v.encode('utf8'))
         elif isinstance(v, bytes):
@@ -211,7 +210,7 @@ class Hasher(object):
         elif v is None:
             pass
         elif isinstance(v, (int, float)):
-            self.md5.update(to_bytes(str(v)))
+            self.md5.update(str(v).encode("utf8"))
         elif isinstance(v, (tuple, list)):
             for e in v:
                 self.update(e)