Remove JavaClass.getAllMethods()/getAllFields()

Their behavior is different in PSI and reflection (two things that this
interface is supposed to unify), so there's no point in making it interface
methods, rather we should just walk supertype hierarchy manually

Also make JavaClassImpl.getSupertypes() invoke PsiClass.getSuperTypes(),
because it also contains java.lang.Object for interfaces, which makes
equals/hashCode/toString appear in interfaces' getAllMethods() as well

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/impl/JavaClassImpl.java

@@ -18,7 +18,6 @@ package org.jetbrains.jet.lang.resolve.java.structure.impl;
 
 import com.intellij.psi.*;
 import com.intellij.psi.impl.PsiSubstitutorImpl;
-import com.intellij.util.containers.ContainerUtil;
 import kotlin.Function1;
 import kotlin.KotlinPackage;
 import org.jetbrains.annotations.NotNull;
@@ -90,14 +89,10 @@ public class JavaClassImpl extends JavaClassifierImpl<PsiClass> implements JavaC
         return typeParameters(getPsi().getTypeParameters());
     }
 
-    @SuppressWarnings("unchecked")
     @Override
     @NotNull
     public Collection<JavaClassifierType> getSupertypes() {
-        // TODO: getPsi().getSuperTypes() ?
-        Collection<JavaClassifierType> superClasses = classifierTypes(getPsi().getExtendsListTypes());
-        Collection<JavaClassifierType> superInterfaces = classifierTypes(getPsi().getImplementsListTypes());
-        return ContainerUtil.collect(ContainerUtil.concat(superClasses, superInterfaces).iterator());
+        return classifierTypes(getPsi().getSuperTypes());
     }
 
     @Override
@@ -111,29 +106,12 @@ public class JavaClassImpl extends JavaClassifierImpl<PsiClass> implements JavaC
         }));
     }
 
-    @Override
-    @NotNull
-    public Collection<JavaMethod> getAllMethods() {
-        return methods(KotlinPackage.filter(getPsi().getAllMethods(), new Function1<PsiMethod, Boolean>() {
-            @Override
-            public Boolean invoke(PsiMethod method) {
-                return !method.isConstructor();
-            }
-        }));
-    }
-
     @Override
     @NotNull
     public Collection<JavaField> getFields() {
         return fields(getPsi().getFields());
     }
 
-    @Override
-    @NotNull
-    public Collection<JavaField> getAllFields() {
-        return fields(getPsi().getAllFields());
-    }
-
     @Override
     @NotNull
     public Collection<JavaConstructor> getConstructors() {