ktor: update docs and cleanup

Author: romainbsl

doc/modules/framework/pages/ktor.adoc

@@ -81,7 +81,7 @@ help us with that by defining a DI container that can be retrieve from multiple
 
 - Application
 - ApplicationCall
-- Routing / Routes
+- Routing / Routes / RoutingContext
 
 [source, kotlin]
 .Example: a Ktor Application declaration, installing the `DIPlugin`, and retrieving it from routes

framework/ktor/kodein-di-framework-ktor-server-jvm/src/main/kotlin/org/kodein/di/ktor/plugin.kt

@@ -6,13 +6,6 @@ import org.kodein.di.DI
 import org.kodein.di.bindInstance
 import org.kodein.di.ktor.DIPlugin.Plugin
 
-@Deprecated(
-    "This is deprecated since Ktor 2+ has renamed the concept",
-    ReplaceWith("DIPlugin"),
-    DeprecationLevel.ERROR
-)
-public typealias DIFeature = DIPlugin
-
 /**
  * Ktor [Plugin] that provide a global [DI] container
  * that would be accessible from everywhere in the Ktor application