Classpaths.sbtPluginReleases resolver is available for every SBT project so there is no need to add it in project/plugins.sbt file.

Reported by David Perez in https://groups.google.com/forum/#!topic/scala-code-coverage-tool/IhaTht7Mtbw

Author: gslowikowski

Diff for: README.md

@@ -16,8 +16,6 @@ Sbt-scoverage is an SBT auto plugin. This means it will only work with SBT 0.13.
 
 Add the plugin to your build with the following in project/plugins.sbt:
 ```scala
-resolvers += Classpaths.sbtPluginReleases
-
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.0.4")
 ```