Remove the bintray-sbt-plugin-releases resolver.
Remove the bintray-sbt-plugin-releases resolver.

It is not necessary, as sbt automatically resolves sbt plugins
from that repository.

gzm0/scala-js,sjrd/scala-js,nicolasstucki/scala-js,scala-js/scala-js,nicolasstucki/scala-js,sjrd/scala-js,gzm0/scala-js,scala-js/scala-js,SebsLittleHelpers/scala-js,SebsLittleHelpers/scala-js,scala-js/scala-js,sjrd/scala-js