Remove some workarounds for py3.6 which is are no longer needed (#213)

Author: aabmass

opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/__init__.py

@@ -15,6 +15,7 @@
 import logging
 import random
 from dataclasses import replace
+from time import time_ns
 from typing import Dict, List, NoReturn, Optional, Set, Union
 
 import google.auth
@@ -35,7 +36,6 @@
 
 # pylint: disable=no-name-in-module
 from google.protobuf.timestamp_pb2 import Timestamp
-from opentelemetry.exporter.cloud_monitoring._time import time_ns
 from opentelemetry.sdk.metrics.export import (
     Gauge,
     Histogram,

opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/_time.py

@@ -471,9 +471,9 @@ def _extract_attributes(
     add_agent_attr: bool = False,
 ) -> trace_types.Span.Attributes:
     """Convert span.attributes to dict."""
-    attributes_dict = BoundedDict(
-        num_attrs_limit
-    )  # type: BoundedDict[str, trace_types.AttributeValue]
+    attributes_dict: BoundedDict[
+        str, trace_types.AttributeValue
+    ] = BoundedDict(num_attrs_limit)
     invalid_value_dropped_count = 0
     for ot_key, ot_value in attrs.items() if attrs else []:
         key = _truncate_str(ot_key, MAX_ATTR_KEY_BYTES)[0]