Remove obsolete InlineStrategy

Replace corresponding metadata property in js.ast with Boolean. This
allows to get rid of dependency of 'js.ast' on 'frontend'.

compiler/frontend/src/org/jetbrains/kotlin/resolve/inline/InlineStrategy.java

@@ -1,27 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.resolve.inline;
-
-public enum InlineStrategy {
-    AS_FUNCTION,
-    IN_PLACE,
-    NOT_INLINE;
-
-    public boolean isInline() {
-        return this != NOT_INLINE;
-    }
-}

compiler/frontend/src/org/jetbrains/kotlin/resolve/inline/InlineUtil.java

@@ -45,7 +45,7 @@ public class InlineUtil {
     }
 
     public static boolean isInline(@Nullable DeclarationDescriptor descriptor) {
-        return descriptor instanceof FunctionDescriptor && getInlineStrategy((FunctionDescriptor) descriptor).isInline();
+        return descriptor instanceof FunctionDescriptor && ((FunctionDescriptor) descriptor).isInline();
     }
 
     public static boolean hasInlineAccessors(@NotNull PropertyDescriptor propertyDescriptor) {
@@ -74,15 +74,6 @@ public class InlineUtil {
         return isInlineOrContainingInline(descriptor.getContainingDeclaration());
     }
 
-    @NotNull
-    private static InlineStrategy getInlineStrategy(@NotNull FunctionDescriptor descriptor) {
-        if (descriptor.isInline()) {
-            return InlineStrategy.AS_FUNCTION;
-        }
-
-        return InlineStrategy.NOT_INLINE;
-    }
-
     public static boolean checkNonLocalReturnUsage(
             @NotNull DeclarationDescriptor fromFunction,
             @NotNull KtExpression startExpression,