Remove contextvars workaround

Fixes open-telemetry#2008

opentelemetry-api/src/opentelemetry/context/contextvars_context.py

@@ -12,16 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from contextvars import ContextVar
-from sys import version_info
 
 from opentelemetry.context.context import Context, _RuntimeContext
 
-if (3, 5, 3) <= version_info < (3, 7):
-    import aiocontextvars  # type: ignore # pylint:disable=unused-import,import-error
-
-elif (3, 4) < version_info <= (3, 5, 2):
-    import opentelemetry.context.aiocontextvarsfix  # pylint:disable=unused-import
-
 
 class ContextVarsRuntimeContext(_RuntimeContext):
     """An implementation of the RuntimeContext interface which wraps ContextVar under

opentelemetry-api/tests/context/test_contextvars_context.py

@@ -12,22 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
 from unittest.mock import patch
 
 from opentelemetry import context
+from opentelemetry.context.contextvars_context import ContextVarsRuntimeContext
 
 from .base_context import ContextTestCases
 
-try:
-    import contextvars  # pylint: disable=unused-import
-
-    from opentelemetry.context.contextvars_context import (
-        ContextVarsRuntimeContext,
-    )
-except ImportError:
-    raise unittest.SkipTest("contextvars not available")
-
 
 class TestContextVarsContext(ContextTestCases.BaseTest):
     def setUp(self) -> None: