Remove stale @flaky annotations from Synapse tests

The actual assertion failures are fixed in this PR. The timeout
issue these annotations referenced appears to be resolved.

Author: bm1549

dd-java-agent/instrumentation/synapse-3.0/src/test/groovy/datadog/trace/instrumentation/synapse3/SynapseTest.groovy

@@ -12,7 +12,6 @@ import datadog.trace.api.config.GeneralConfig
 import datadog.trace.api.env.CapturedEnvironment
 import datadog.trace.bootstrap.instrumentation.api.Tags
 import datadog.trace.core.DDSpan
-import datadog.trace.test.util.Flaky
 import groovy.text.GStringTemplateEngine
 import okhttp3.MediaType
 import okhttp3.OkHttpClient
@@ -31,7 +30,6 @@ import spock.lang.Shared
 import java.lang.reflect.Field
 import java.util.concurrent.TimeUnit
 
-@Flaky("Occasionally times out when receiving traces")
 abstract class SynapseTest extends VersionedNamingTestBase {
 
   String expectedServiceName() {
@@ -327,7 +325,6 @@ abstract class SynapseTest extends VersionedNamingTestBase {
   }
 }
 
-@Flaky("Occasionally times out when receiving traces")
 class SynapseV0ForkedTest extends SynapseTest implements TestingGenericHttpNamingConventions.ClientV0 {
 
 
@@ -337,7 +334,6 @@ class SynapseV0ForkedTest extends SynapseTest implements TestingGenericHttpNamin
   }
 }
 
-@Flaky("Occasionally times out when receiving traces")
 class SynapseV1ForkedTest extends SynapseTest implements TestingGenericHttpNamingConventions.ClientV1 {
 
   @Override