Revert "Add memorysize tag to enhanced lambda metrics"

Author: jcstorms1

aws/logs_monitoring/enhanced_lambda_metrics.py

@@ -44,7 +44,6 @@
 METRICS_TO_PARSE_FROM_REPORT = [
     DURATION_METRIC_NAME,
     BILLED_DURATION_METRIC_NAME,
-    MEMORY_ALLOCATED_FIELD_NAME,
     MAX_MEMORY_USED_METRIC_NAME,
 ]