@nowarns aren't needed in Reusability.derive any more

Cos I switched over to using the lazy vals instead of the vars in the
sum type cases

Author: japgolly

core/src/main/scala/japgolly/scalajs/react/internal/ReusabilityMacros.scala

@@ -93,7 +93,7 @@ class ReusabilityMacros(val c: Context) extends MacroUtils {
       val typ = weakTypeOf[A]
       val ra = ReusabilityA(typ)
       val prep = init1.varDef(ra, q"new Reusability(null)")
-      lazies += q"""@_root_.scala.annotation.nowarn("cat=unused") implicit lazy val ${TermName("_" + prep.decodedName)}: $ra = $Reusability.byName($prep)"""
+      lazies += q"""implicit lazy val ${TermName("_" + prep.decodedName)}: $ra = $Reusability.byName($prep)"""
       lazy val completed: c.Expr[Reusability[A]] = {
         val inner = complete
         val impl = q"$prep = $inner"

doc/changelog/1.7.2.md

@@ -0,0 +1,3 @@
+# 1.7.2
+
+* Fix: no longer generate warnings when `-Wunused:nowarn` is enabled

test/src/test/scala/japgolly/scalajs/react/core/ReusabilityTest.scala

@@ -81,15 +81,15 @@ object ReusabilityTest extends TestSuite {
       final case class Suite[+Z](bms: Vector[BM[Z]]) extends Item[Z]
       final case class Blah1[+B](blah: Option[Blah1[B]]) extends Item[B]
       final case class Blah2[+C](blah: Option[Blah2[C]], i: Int) extends Item[C]
+      final case class Blah3(i: Int) extends Item[Nothing]
 
       final case class BM[+W](value: W)
 
       implicit def reusabilityBM[A: Reusability]: Reusability[BM[A]] =
         Reusability.derive
 
-      implicit def reusability[H: Reusability]: Reusability[Item[H]] = {
+      implicit def reusability[H: Reusability]: Reusability[Item[H]] =
         Reusability.derive
-      }
     }
   }