Remove unused ProjectRootModificationTrackerFixer.kt

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/ProjectRootModificationTrackerFixer.kt

@@ -1,29 +0,0 @@
-/*
- * Copyright 2010-2018 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.idea.caches
-
-import com.intellij.ProjectTopics
-import com.intellij.openapi.components.ProjectComponent
-import com.intellij.openapi.project.Project
-import com.intellij.openapi.roots.ModuleRootEvent
-import com.intellij.openapi.roots.ModuleRootListener
-import com.intellij.openapi.roots.ProjectRootManager
-
-// This is a workaround for IDEA < 183. For details, see IDEA-200525.
-class ProjectRootModificationTrackerFixer(val project: Project) : ProjectComponent {
-    override fun initComponent() {
-        project.messageBus.connect(project).subscribe(
-            ProjectTopics.PROJECT_ROOTS,
-            object : ModuleRootListener {
-                override fun rootsChanged(event: ModuleRootEvent) {
-                    // Forcefully increment modification counter. This would cause invalidation of
-                    // all caches that depend on ProjectRootModificationTracker tracker.
-                    ProjectRootManager.getInstance(project).incModificationCount()
-                }
-            }
-        )
-    }
-}