feat: Strip setuptools (#322)

Author: astuyve

Dockerfile

@@ -17,3 +17,4 @@ RUN find ./python/lib/$runtime/site-packages -name \*.pyc -delete
 # Remove botocore (40MB) to reduce package size. aws-xray-sdk
 # installs it, while it's already provided by the Lambda Runtime.
 RUN rm -rf ./python/lib/$runtime/site-packages/botocore*
+RUN rm -rf ./python/lib/$runtime/site-packages/setuptools