LibWeb/CSS: Replace resolve_number_deprecated() with resolve_number()

Author: https://github.com/AtkinsSJ
Commit: 0dba531772
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6290
Reviewed-by: https://github.com/tcl3 ✅

Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp

@@ -3067,21 +3067,6 @@ Optional<Time> CalculatedStyleValue::resolve_time(CalculationResolutionContext c
     return {};
 }
 
-Optional<double> CalculatedStyleValue::resolve_number_deprecated(CalculationResolutionContext const& context) const
-{
-    auto result = m_calculation->resolve(context);
-    if (!result.type().has_value() || !result.type()->matches_number(m_context.percentages_resolve_as))
-        return {};
-
-    // https://drafts.csswg.org/css-values/#calc-ieee
-    // NaN does not escape a top-level calculation; it’s censored into a zero value.
-    auto value = result.value();
-    if (isnan(value))
-        return 0.;
-
-    return value;
-}
-
 Optional<double> CalculatedStyleValue::resolve_number(CalculationResolutionContext const& context) const
 {
     auto result = resolve_value(context);