Revert "Include sources in binary jars"
Revert "Include sources in binary jars"

This reverts commit 8072b7dbc740514e2044c6c703d33a9645464ae2 (once
again) in order to further diagnose the Javadoc-related CI build failure
it causes (http://tinyurl.com/zymj3v5).

blindpirate/gradle,blindpirate/gradle,lsmaira/gradle,robinverduijn/gradle,robinverduijn/gradle,gstevey/gradle,blindpirate/gradle,gradle/gradle,gstevey/gradle,gstevey/gradle,blindpirate/gradle,gstevey/gradle,blindpirate/gradle,lsmaira/gradle,gstevey/gradle,gradle/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,lsmaira/gradle,blindpirate/gradle,gstevey/gradle,gradle/gradle,lsmaira/gradle,blindpirate/gradle,lsmaira/gradle,robinverduijn/gradle,lsmaira/gradle,robinverduijn/gradle,gradle/gradle,lsmaira/gradle,blindpirate/gradle,lsmaira/gradle,robinverduijn/gradle,robinverduijn/gradle,robinverduijn/gradle,gstevey/gradle,robinverduijn/gradle,gstevey/gradle,gradle/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,lsmaira/gradle,gradle/gradle,gstevey/gradle,robinverduijn/gradle,lsmaira/gradle,gradle/gradle,gradle/gradle