Remove duplicating interface in J2K

#KT-33445 fixed

idea/idea-j2k/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessings.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 

idea/src/org/jetbrains/kotlin/idea/j2k/J2KPostProcessingRegistrarImpl.kt

@@ -51,16 +51,6 @@ import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.utils.mapToIndex
 import java.util.*
 
-interface J2kPostProcessing {
-    fun createAction(element: KtElement, diagnostics: Diagnostics, settings: ConverterSettings?): (() -> Unit)? =
-        createAction(element, diagnostics)
-
-    fun createAction(element: KtElement, diagnostics: Diagnostics): (() -> Unit)? =
-        createAction(element, diagnostics, null)
-
-    val writeActionNeeded: Boolean
-}
-
 object J2KPostProcessingRegistrarImpl : J2KPostProcessingRegistrar {
     private val myProcessings = ArrayList<J2kPostProcessing>()