Remove unused scala-compiler and rhino dependencies (#2054)

* Remove unused scala-compiler and rhino dependencies

- scala-compiler: only scala.reflect.Manifest was used, which is part
  of scala-library; no compiler internals (scala.tools.nsc etc.) were
  referenced anywhere
- rhino: removed the optional server-side JavaScript execution feature
  (JavaScriptContext) and the corresponding Rhino type references in
  LiftSession (NativeArray, Scriptable, UniqueTag, fixScriptableObject)
- Upgraded sbt-web from com.typesafe.sbt 1.4.4 (Bintray, defunct) to
  com.github.sbt 1.5.8 (Maven Central) so the build resolves cleanly

All 282 tests pass.

https://claude.ai/code/session_01AePRXsUCMkgsWYeHTTgR5T

* Restore rhino / JavaScriptContext (revert that part of previous commit)

Keep only the scala-compiler removal. The JavaScriptContext server-side
JavaScript execution feature and the corresponding Rhino dependency will
be evaluated for removal separately.

https://claude.ai/code/session_01AePRXsUCMkgsWYeHTTgR5T

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: farmdawgnation

build.sbt

@@ -101,7 +101,6 @@ lazy val util =
       description := "Utilities Library",
       Test / parallelExecution := false,
       libraryDependencies ++= Seq(
-        scala_compiler(scalaVersion.value),
         joda_time,
         joda_convert,
         commons_codec,

project/Dependencies.scala

@@ -47,14 +47,6 @@ object Dependencies {
   lazy val scala_parser           = "org.scala-lang.modules"     %% "scala-parser-combinators" % "2.4.0"
   lazy val xerces                 = "xerces" % "xercesImpl" % "2.12.2"
 
-  lazy val scala_compiler: ModuleMap = (version: String) => {
-    if (version.startsWith("2")) {
-      "org.scala-lang"         % "scala-compiler"    % version
-    } else {
-      "org.scala-lang"         % "scala3-compiler_3" % version
-    }
-  }
-
   // Aliases
   lazy val mongo_driver = mongo_java_driver
   lazy val scalaz7 = scalaz7_core

project/plugins.sbt

@@ -1,7 +1,7 @@
 DefaultOptions.addPluginResolvers
 resolvers += Resolver.typesafeRepo("releases")
 
-addSbtPlugin("com.typesafe.sbt" % "sbt-web" % "1.4.4")
+addSbtPlugin("com.github.sbt" % "sbt-web" % "1.5.8")
 //addSbtPlugin("org.jetbrains" % "sbt-idea-plugin" % "2.1.3")
 
 lazy val buildPlugin = RootProject(uri("https://github.com/lift/sbt-lift-build.git#01af51e838d2162ebeae56505a635860392b09a6"))

web/webkit/src/main/scala/net/liftweb/javascript/JavaScriptContext.scala

@@ -109,4 +109,3 @@ object JavaScriptContext {
     }
   }
 }
-