remove third party file and references

Author: grahamfuller1

README.md

@@ -122,5 +122,3 @@ To execute our corporate CLA, which is required if your contribution is on behal
 
 ### Licensing
 The AWS Lambda OpenTracing Java SDK is licensed under the Apache 2.0 License.
-
-The AWS Lambda OpenTracing Java SDK also uses source code from third party libraries. Full details on which libraries are used and the terms under which they are licensed can be found in the [third party notices document](THIRD_PARTY_NOTICES.md).