Reverted overload to private instead of protected.

src/EFCore/Query/Internal/ParameterExtractingExpressionVisitor.cs

@@ -81,14 +81,7 @@ public virtual Expression ExtractParameters([NotNull] Expression expression)
             return ExtractParameters(expression, clearEvaluatedValues: true);
         }
 
-        /// <summary>
-        ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
-        ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
-        ///     any release. You should only use it directly in your code with extreme caution and knowing that
-        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
-        /// </summary>
-        protected virtual Expression ExtractParameters([NotNull] Expression expression,
-            bool clearEvaluatedValues = false)
+        private Expression ExtractParameters([NotNull] Expression expression, bool clearEvaluatedValues = false)
         {
             var oldEvaluatableExpressions = _evaluatableExpressions;
             _evaluatableExpressions = _evaluatableExpressionFindingExpressionVisitor.Find(expression);