Remove supersafe plugin for code portability

Author: bigwheel

macro/src/test/scala/com/github/bigwheel/thpy/MacroSpec.scala

@@ -10,7 +10,7 @@ class MacroSpec extends FunSpec with Matchers {
   // Following code has type erasue problem then this Equality is not completed.
   private[this] implicit val _ = new Equality[NamedParam.Typed[Int]] {
     override def areEqual(lhs: NamedParam.Typed[Int], rhs: Any): Boolean = rhs match {
-      case rhs2 : NamedParam.Typed[Int] @unchecked =>
+      case rhs2 : NamedParam.Typed[Int] =>
         lhs.tpe == rhs2.tpe && lhs.name == rhs2.name && lhs.value == rhs2.value
       case _ =>
         false

project/plugins.sbt

@@ -1,3 +1 @@
 logLevel := Level.Warn
-
-addSbtPlugin("com.artima.supersafe" % "sbtplugin" % "1.1.2")