Revert "Revert "[light classes] drop old light classes and backend: iteration #7""

This reverts commit d1cde22254.

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/builder/LightClassBuilder.kt

@@ -60,8 +60,6 @@ fun buildLightClass(
         generate(state, files)
 
         val javaFileStub = classBuilderFactory.result()
-
-        stubComputationTrackerInstance(project)?.onStubComputed(javaFileStub, context)
         return LightClassBuilderResult(javaFileStub, context.bindingContext, state.collectedExtraJvmDiagnostics)
     } catch (e: ProcessCanceledException) {
         throw e

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/builder/stubComputationTracker.kt

@@ -1,17 +0,0 @@
-/*
- * Copyright 2010-2022 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.
- */
-
-package org.jetbrains.kotlin.cli.jvm.compiler.builder
-
-import com.intellij.openapi.project.Project
-import com.intellij.psi.impl.java.stubs.PsiJavaFileStub
-
-fun stubComputationTrackerInstance(project: Project): StubComputationTracker? {
-    return project.getComponent(StubComputationTracker::class.java)
-}
-
-interface StubComputationTracker {
-    fun onStubComputed(javaFileStub: PsiJavaFileStub, context: LightClassConstructionContext)
-}