Rm unused import

Author: tammy-baylis-swi

exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/metric_exporter/__init__.py

@@ -12,7 +12,6 @@
 # limitations under the License.
 from __future__ import annotations
 
-from dataclasses import replace
 import gzip
 import logging
 import zlib