JVM IR: do not load KDeclarationContainer from builtins

Like other classes declared in the standard library, construct a mock of
it in JvmSymbols. This is needed to move classes in kotlin.reflect out
from builtins and to the JVM part of the standard library.

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -493,11 +493,6 @@ public abstract class KotlinBuiltIns {
         return getBuiltInClassByFqName(FQ_NAMES.kClass.toSafe());
     }
 
-    @NotNull
-    public ClassDescriptor getKDeclarationContainer() {
-        return getBuiltInClassByFqName(FQ_NAMES.kDeclarationContainer.toSafe());
-    }
-
     @NotNull
     public ClassDescriptor getKCallable() {
         return getBuiltInClassByFqName(FQ_NAMES.kCallable.toSafe());