Remove deprecated declarations from project code, cleanup usages

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/FunctionDescriptorImpl.java

@@ -144,7 +144,7 @@ public abstract class FunctionDescriptorImpl extends DeclarationDescriptorNonRoo
         this.isImpl = isImpl;
     }
 
-    public void setHiddenToOvercomeSignatureClash(boolean hiddenToOvercomeSignatureClash) {
+    private void setHiddenToOvercomeSignatureClash(boolean hiddenToOvercomeSignatureClash) {
         isHiddenToOvercomeSignatureClash = hiddenToOvercomeSignatureClash;
     }
 
@@ -339,7 +339,7 @@ public abstract class FunctionDescriptorImpl extends DeclarationDescriptorNonRoo
     }
 
     @Nullable
-    protected KotlinType getExtensionReceiverParameterType() {
+    private KotlinType getExtensionReceiverParameterType() {
         if (extensionReceiverParameter == null) return null;
         return extensionReceiverParameter.getType();
     }

core/descriptors/src/org/jetbrains/kotlin/types/TypeUtils.java

@@ -216,7 +216,7 @@ public class TypeUtils {
         for (TypeParameterDescriptor parameterDescriptor : parameters) {
             result.add(new TypeProjectionImpl(parameterDescriptor.getDefaultType()));
         }
-        return org.jetbrains.kotlin.utils.CollectionsKt.toReadOnlyList(result);
+        return CollectionsKt.toList(result);
     }
 
     @NotNull