updating val templates

Author: Miqueasher

validator/src/main/resources/expected-data-template/python/ec2/default/aws-otel-custom-metrics.mustache

@@ -40,9 +40,6 @@
     -
       name: operation.type
       value: custom_export_1
-    -
-      name: service.name
-      value: {{serviceName}}
     -
       name: telemetry.auto.version
       value: ANY_VALUE
@@ -95,9 +92,6 @@
     -
       name: operation.type
       value: histogram
-    -
-      name: service.name
-      value: {{serviceName}}
     -
       name: telemetry.auto.version
       value: ANY_VALUE