Remove sections about dependency management features not part of 4.4
Remove sections about dependency management features not part of 4.4

These features will be officially released in a later version and
will not be enabled by default in 4.4.

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