updating val templates

Author: Miqueasher

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

@@ -4,12 +4,6 @@
   metricName: custom_export_counter
   namespace: CWAgent
   dimensions:
-    -
-      name: Environment
-      value: ec2:default
-    -
-      name: Service
-      value: {{serviceName}}
     -
       name: service.name
       value: {{serviceName}}
@@ -65,12 +59,6 @@
   metricName: test_histogram
   namespace: CWAgent
   dimensions:
-    -
-      name: Environment
-      value: ec2:default
-    -
-      name: Service
-      value: {{serviceName}}
     -
       name: service.name
       value: {{serviceName}}