Cleanup JavaElement model from methods used only in substitutor

Downcast everything used in JavaTypeSubstitutorImpl to *Impl, remove methods
from interfaces, inline/move some of them

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaClass.java

@@ -50,9 +50,6 @@ public interface JavaClass extends JavaClassifier, JavaTypeParameterListOwner, J
     @NotNull
     Collection<JavaConstructor> getConstructors();
 
-    @NotNull
-    JavaClassifierType getDefaultType();
-
     @NotNull
     OriginKind getOriginKind();
 

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaClassifierType.java

@@ -20,17 +20,12 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.ReadOnly;
 
-import java.util.Collection;
 import java.util.List;
 
 public interface JavaClassifierType extends JavaType, JavaAnnotationOwner {
     @Nullable
     JavaClassifier getClassifier();
 
-    @NotNull
-    @ReadOnly
-    Collection<JavaClassifierType> getSupertypes();
-
     @NotNull
     String getPresentableText();
 

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaType.java

@@ -16,9 +16,5 @@
 
 package org.jetbrains.kotlin.load.java.structure;
 
-import org.jetbrains.annotations.NotNull;
-
 public interface JavaType {
-    @NotNull
-    JavaArrayType createArrayType();
 }

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaTypeParameter.java

@@ -17,7 +17,6 @@
 package org.jetbrains.kotlin.load.java.structure;
 
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.ReadOnly;
 
 import java.util.Collection;
@@ -26,13 +25,4 @@ public interface JavaTypeParameter extends JavaClassifier {
     @NotNull
     @ReadOnly
     Collection<JavaClassifierType> getUpperBounds();
-
-    @Nullable
-    JavaTypeParameterListOwner getOwner();
-
-    @NotNull
-    JavaType getType();
-
-    @NotNull
-    JavaTypeProvider getTypeProvider();
 }

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaTypeProvider.java

@@ -1,33 +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.load.java.structure;
-
-import org.jetbrains.annotations.NotNull;
-
-public interface JavaTypeProvider {
-    @NotNull
-    JavaType createJavaLangObjectType();
-
-    @NotNull
-    JavaWildcardType createUpperBoundWildcard(@NotNull JavaType bound);
-
-    @NotNull
-    JavaWildcardType createLowerBoundWildcard(@NotNull JavaType bound);
-
-    @NotNull
-    JavaWildcardType createUnboundedWildcard();
-}

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaWildcardType.java

@@ -16,7 +16,6 @@
 
 package org.jetbrains.kotlin.load.java.structure;
 
-import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 public interface JavaWildcardType extends JavaType {
@@ -24,7 +23,4 @@ public interface JavaWildcardType extends JavaType {
     JavaType getBound();
 
     boolean isExtends();
-
-    @NotNull
-    JavaTypeProvider getTypeProvider();
 }