opentelemetry callback plugin: remove code for Python < 3.7 (#9482)

* opentelemetry callback plugin: remove code for Python < 3.7

* add changelog frag

changelogs/fragments/9482-opentelemetry-python-37.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - opentelemetry callback plugin - remove code handling Python versions prior to 3.7 (https://github.com/ansible-collections/community.general/pull/9482).

plugins/callback/opentelemetry.py

@@ -137,9 +137,8 @@ import getpass
 import json
 import os
 import socket
-import sys
-import time
 import uuid
+from time import time_ns
 
 from collections import OrderedDict
 from os.path import basename
@@ -165,14 +164,6 @@ try:
     from opentelemetry.sdk.trace.export.in_memory_span_exporter import (
         InMemorySpanExporter
     )
-    # Support for opentelemetry-api <= 1.12
-    try:
-        from opentelemetry.util._time import _time_ns
-    except ImportError as imp_exc:
-        OTEL_LIBRARY_TIME_NS_ERROR = imp_exc
-    else:
-        OTEL_LIBRARY_TIME_NS_ERROR = None
-
 except ImportError as imp_exc:
     OTEL_LIBRARY_IMPORT_ERROR = imp_exc
     OTEL_LIBRARY_TIME_NS_ERROR = imp_exc
@@ -180,16 +171,6 @@ else:
     OTEL_LIBRARY_IMPORT_ERROR = None
 
 
-if sys.version_info >= (3, 7):
-    time_ns = time.time_ns
-elif not OTEL_LIBRARY_TIME_NS_ERROR:
-    time_ns = _time_ns
-else:
-    def time_ns():
-        # Support versions older than 3.7 with opentelemetry-api > 1.12
-        return int(time.time() * 1e9)
-
-
 class TaskData:
     """
     Data about an individual task.