Remove unused imports from test
package datadog.trace
-import datadog.opentracing.DDSpan
import datadog.opentracing.DDTracer
import datadog.opentracing.propagation.HttpCodec
import datadog.trace.api.Config
-import datadog.trace.api.DDTags
import datadog.trace.common.sampling.AllSampler
import datadog.trace.common.sampling.RateByServiceSampler
import datadog.trace.common.writer.DDAgentWriter
