LibWeb: Remove redundant identifier_to_edge() function

The enums generator has this covered already.

Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -2871,22 +2871,6 @@ RefPtr<StyleValue> Parser::parse_background_value(Vector<ComponentValue> const&
         background_clip.release_nonnull());
 }
 
-static Optional<PositionEdge> identifier_to_edge(ValueID identifier)
-{
-    switch (identifier) {
-    case ValueID::Top:
-        return PositionEdge::Top;
-    case ValueID::Bottom:
-        return PositionEdge::Bottom;
-    case ValueID::Left:
-        return PositionEdge::Left;
-    case ValueID::Right:
-        return PositionEdge::Right;
-    default:
-        return {};
-    }
-}
-
 static Optional<LengthPercentage> style_value_to_length_percentage(auto value)
 {
     if (value->is_percentage())
@@ -2985,11 +2969,11 @@ RefPtr<StyleValue> Parser::parse_single_background_position_value(TokenStream<Co
             if (is_horizontal(identifier)) {
                 bool offset_provided = false;
                 auto offset = try_parse_offset(offset_provided);
-                horizontal = EdgeOffset { *identifier_to_edge(identifier), offset, true, offset_provided };
+                horizontal = EdgeOffset { *value_id_to_position_edge(identifier), offset, true, offset_provided };
             } else if (is_vertical(identifier)) {
                 bool offset_provided = false;
                 auto offset = try_parse_offset(offset_provided);
-                vertical = EdgeOffset { *identifier_to_edge(identifier), offset, true, offset_provided };
+                vertical = EdgeOffset { *value_id_to_position_edge(identifier), offset, true, offset_provided };
             } else if (identifier == ValueID::Center) {
                 found_center = true;
             } else {
@@ -3068,7 +3052,7 @@ RefPtr<StyleValue> Parser::parse_single_background_position_x_or_y_value(TokenSt
             transaction.commit();
             return EdgeStyleValue::create(relative_edge, Percentage { 50 });
         }
-        if (auto edge = identifier_to_edge(identifier); edge.has_value()) {
+        if (auto edge = value_id_to_position_edge(identifier); edge.has_value()) {
             relative_edge = *edge;
         } else {
             return nullptr;