Do not use ConfigurationFileCrcFactory comparing scratch content because it needed the document to be saved

Check only if new fragment is not empty to avoid recompilation on minor changes

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/ScratchFileAutoRunner.kt

@@ -45,7 +45,7 @@ class ScratchFileAutoRunner(private val project: Project) : DocumentListener {
         val panel = getScratchPanel(file, project) ?: return
         if (!panel.scratchFile.options.isInteractiveMode) return
 
-        if (isScratchChanged(project, file)) {
+        if (!event.newFragment.isBlank()) {
             runScratch(panel)
         }
     }

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/scratchRunnerUtil.kt

@@ -1,24 +0,0 @@
-/*
- * 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.
- */
-
-package org.jetbrains.kotlin.idea.scratch
-
-import com.intellij.openapi.externalSystem.service.project.autoimport.ConfigurationFileCrcFactory
-import com.intellij.openapi.project.Project
-import com.intellij.openapi.util.Key
-import com.intellij.openapi.vfs.VirtualFile
-import org.jetbrains.kotlin.psi.UserDataProperty
-
-fun isScratchChanged(project: Project, file: VirtualFile) : Boolean {
-    val beforeLastRun = file.crcWithoutSpaces
-    val newCrc = ConfigurationFileCrcFactory(project, file).create()
-    if (beforeLastRun != newCrc) {
-        file.crcWithoutSpaces = newCrc
-        return true
-    }
-    return false
-}
-
-private var VirtualFile.crcWithoutSpaces by UserDataProperty(Key.create<Long>("CRC_WITHOUT_SPACES"))