Fix scala#11709: Do not depend on non-boostrapped Scala.js library.

Author: sjrd

project/Build.scala

@@ -54,6 +54,14 @@ abstract class DottyJSPlugin(settings: Seq[Setting[_]]) extends AutoPlugin {
       _.filter(!_.name.startsWith("scala3-library_sjs1"))
     },
 
+    /* #11709 Remove the dependency on scala3-library that ScalaJSPlugin adds.
+     * Instead, in this build, we use `.dependsOn` relationships to depend on
+     * the appropriate, locally-defined, scala3-library-bootstrappedJS.
+     */
+    libraryDependencies ~= {
+      _.filter(!_.name.startsWith("scala3-library_sjs1"))
+    },
+
     // Replace the JVM JUnit dependency by the Scala.js one
     libraryDependencies ~= {
       _.filter(!_.name.startsWith("junit-interface"))