codeNarc clean-up

Author: dougqh

dd-java-agent/appsec/src/test/groovy/com/datadog/appsec/AppSecSystemSpecification.groovy

@@ -14,7 +14,6 @@ import datadog.remoteconfig.state.ConfigKey
 import datadog.remoteconfig.state.ProductListener
 import datadog.trace.api.Config
 import datadog.trace.api.TagMap
-import datadog.trace.api.internal.TraceSegment
 import datadog.trace.api.gateway.Flow
 import datadog.trace.api.gateway.IGSpanInfo
 import datadog.trace.api.gateway.RequestContext