Remove workbench plugin

Author: kazievab

build.sbt

@@ -70,7 +70,7 @@ lazy val demo = (project in file("demo")).dependsOn(core, lab)
   yarnExtraArgs                    := Seq("--silent"),
   webpackConfigFile in fastOptJS   := Some(baseDirectory.value / "dev.webpack.config.js"),
   skip in publish := true
-).enablePlugins(ScalaJSBundlerPlugin, WorkbenchPlugin)
+).enablePlugins(ScalaJSBundlerPlugin)
 
 lazy val commonSettings = Seq(
   version := Settings.version,

project/plugins.sbt

@@ -9,6 +9,4 @@ addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)
 
 addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler-sjs06" % "0.16.0")
 
-addSbtPlugin("com.lihaoyi" % "workbench" % "0.4.1")
-
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.2")