chore: remove vendored contextvars module

ddtrace/internal/coverage/code.py

@@ -1,4 +1,5 @@
 from collections import defaultdict
+from contextvars import ContextVar
 from copy import deepcopy
 from inspect import getmodule
 import os
@@ -19,7 +20,6 @@
 from ddtrace.internal.packages import purelib_path
 from ddtrace.internal.packages import stdlib_path
 from ddtrace.internal.test_visibility.coverage_lines import CoverageLines
-from ddtrace.vendor.contextvars import ContextVar
 
 
 log = get_logger(__name__)

ddtrace/vendor/__init__.py

@@ -60,20 +60,6 @@
 License: BSD 3
 
 
-contextvars
--------------
-
-Source: https://github.com/MagicStack/contextvars
-Version: 2.4
-License: Apache License 2.0
-
-Notes:
-  - removal of metaclass usage
-  - formatting
-  - use a plain old dict instead of immutables.Map
-  - removal of `*` syntax
-
-
 sqlcommenter
 ------------
 
@@ -107,7 +93,7 @@
     yacc.py and lex.py files here.
     Didn't copy: cpp.py, ctokens.py, ygen.py (didn't see them used)
 
-    
+
 jsonpath-ng
 ---------