Remove Python 2 support for utils/json.py

Signed-off-by: Bryce Gattis <[email protected]>

src/rez/utils/json.py

@@ -4,36 +4,7 @@
 
 import json
 from json import dumps  # noqa (forwarded)
-import sys
 
 
-if sys.version_info.major >= 3:
-
-    def loads(data):
-        return json.loads(data)
-
-# py2
-else:
-
-    def loads(json_text):
-        """Avoids returning unicodes in py2.
-
-        https://stackoverflow.com/questions/956867/how-to-get-string-objects-instead-of-unicode-from-json
-        """
-        def _byteify(input, ignore_dicts=False):
-            if isinstance(input, list):
-                return [_byteify(x) for x in input]
-            elif isinstance(input, unicode):
-                try:
-                    return str(input)
-                except UnicodeEncodeError:
-                    return input
-            elif isinstance(input, dict) and not ignore_dicts:
-                return {
-                    _byteify(k, ignore_dicts=True): _byteify(v, True)
-                    for k, v in input.items()
-                }
-            else:
-                return input
-
-        return _byteify(json.loads(json_text, object_hook=_byteify))
+def loads(data):
+    return json.loads(data)