Reverting changes made to run the workflow

Author: Jeel Mehta

.github/workflows/dotnet-ec2-adot-sigv4-test.yml

@@ -32,11 +32,11 @@ env:
   E2E_TEST_AWS_REGION: 'us-west-2'
   E2E_TEST_ACCOUNT_ID: ${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ACCOUNT_ID }}
   E2E_TEST_ROLE_NAME: ${{ secrets.APPLICATION_SIGNALS_E2E_TEST_ROLE_NAME }}
-  DOTNET_VERSION: ${{ inputs.dotnet-version || '8.0' }}
-  SAMPLE_APP_ZIP: s3://aws-appsignals-sample-app-prod-us-east-1/dotnet-sample-app-${{ inputs.dotnet-version || '8.0' }}.zip
+  DOTNET_VERSION: ${{ inputs.dotnet-version }}
+  SAMPLE_APP_ZIP: s3://aws-appsignals-sample-app-prod-us-east-1/dotnet-sample-app-${{ inputs.dotnet-version }}.zip
   METRIC_NAMESPACE: ApplicationSignals
   LOG_GROUP_NAME: aws/spans
-  ADOT_DISTRO_NAME: ${{ inputs.staging_distro_name || 'aws-opentelemetry-distro' }}
+  ADOT_DISTRO_NAME: ${{ inputs.staging_distro_name }}
   TEST_RESOURCES_FOLDER: ${GITHUB_WORKSPACE}
 
 jobs: