Remove rez.backport (AcademySoftwareFoundation#1634)

Signed-off-by: Bryce Gattis <brycegattis@yahoo.com>

src/rez/cli/complete.py

@@ -81,7 +81,7 @@ def _pop_arg(l, p):
             comp_point += len(s)
 
     # create parser for subcommand
-    from rez.backport.importlib import import_module
+    from importlib import import_module
     data = subcommands[subcommand]
     module_name = data.get("module_name", "rez.cli.%s" % subcommand)
     mod = import_module(module_name)

src/rez/cli/forward.py

@@ -53,7 +53,7 @@ def command(opts, parser, extra_arg_groups=None):
 
     if isinstance(doc["module"], str):
         # refers to a rez module
-        from rez.backport.importlib import import_module
+        from importlib import import_module
         namespace = "rez.%s" % doc["module"]
         module = import_module(namespace)
     else:

src/rez/config.py

@@ -15,9 +15,9 @@
 from rez.vendor.schema.schema import Schema, SchemaError, And, Or, Use
 from rez.vendor import yaml
 from rez.vendor.yaml.error import YAMLError
-from rez.backport.lru_cache import lru_cache
 import rez.deprecations
 from contextlib import contextmanager
+from functools import lru_cache
 from inspect import ismodule
 import os
 import re

src/rez/plugin_managers.py

@@ -110,7 +110,7 @@ def register_plugin(self, plugin_name, plugin_class, plugin_module):
 
     def load_plugins(self):
         import pkgutil
-        from rez.backport.importlib import import_module
+        from importlib import import_module
         type_module_name = 'rezplugins.' + self.type_name
         package = import_module(type_module_name)
 

src/rez/utils/resources.py

@@ -33,11 +33,12 @@
 
 See the 'pets' unit test in tests/test_resources.py for a complete example.
 """
+from functools import lru_cache
+
 from rez.utils.data_utils import cached_property, AttributeForwardMeta, \
     LazyAttributeMeta
 from rez.config import config
 from rez.exceptions import ResourceError
-from rez.backport.lru_cache import lru_cache
 from rez.utils.logging_ import print_debug
 
 

src/rezplugins/package_repository/filesystem.py

@@ -6,6 +6,7 @@
 Filesystem-based package repository
 """
 from contextlib import contextmanager
+from functools import lru_cache
 import os.path
 import os
 import stat
@@ -32,7 +33,6 @@
 from rez.utils.platform_ import platform_
 from rez.utils.yaml import load_yaml
 from rez.config import config
-from rez.backport.lru_cache import lru_cache
 from rez.vendor.schema.schema import Schema, Optional, And, Use, Or
 from rez.version import Version, VersionRange