Remove obsolete bunch fixes for 173 & as31

idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt

@@ -1,17 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. 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.core.formatter
-
-import com.intellij.psi.codeStyle.CommonCodeStyleSettings
-
-/**
- * Method copyFrom is absent in 173.
- * BUNCH: 181
- */
-fun CommonCodeStyleSettings.copyFromEx(source: CommonCodeStyleSettings) {
-    @Suppress("IncompatibleAPI")
-    copyFrom(source)
-}

idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonCodeStyleSettings.java

@@ -21,7 +21,6 @@ import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.idea.KotlinLanguage;
-import org.jetbrains.kotlin.idea.core.formatter.CompatibilityKt;
 import org.jetbrains.kotlin.idea.util.FormatterUtilKt;
 import org.jetbrains.kotlin.idea.util.ReflectionUtil;
 
@@ -237,7 +236,7 @@ public class KotlinCommonCodeStyleSettings extends CommonCodeStyleSettings {
 
     public void restore() {
         if (settingsAgainstPreviousDefaults != null) {
-            CompatibilityKt.copyFromEx(this, settingsAgainstPreviousDefaults);
+            copyFrom(settingsAgainstPreviousDefaults);
         }
     }