Call to implicitly deleted constructor

[build error](https://www.icloud.com/iclouddrive/083j4A7FWBweG3wFmAnHzDyfQ#call_to_implicitly_deleted_constructor) seems to be caused by the double declaration of primitive AccessibilityUnit:

Author: fabOnReact

ReactCommon/react/renderer/attributedstring/TextAttributes.cpp

@@ -98,7 +98,7 @@ void TextAttributes::apply(TextAttributes textAttributes) {
   accessibilityRole = textAttributes.accessibilityRole.has_value()
       ? textAttributes.accessibilityRole
       : accessibilityRole;
-  accessibilityUnit = !textAttributes.accessibilityUnit.empty() ? textAttributes.accessibilityUnit
+  accessibilityUnit = !textAttributes.accessibilityUnit.has_value() ? textAttributes.accessibilityUnit
                                                   : accessibilityUnit;
 }
 

ReactCommon/react/renderer/attributedstring/TextAttributes.h

@@ -79,7 +79,7 @@ class TextAttributes : public DebugStringConvertible {
   // construction.
   std::optional<LayoutDirection> layoutDirection{};
   std::optional<AccessibilityRole> accessibilityRole{};
-  std::string accessibilityUnit{};
+  AccessibilityUnit accessibilityUnit{};
 
 #pragma mark - Operations
 

ReactCommon/react/renderer/attributedstring/primitives.h

@@ -135,6 +135,10 @@ enum class AccessibilityRole {
   Toolbar,
 };
 
+struct AccessibilityUnit {
+  std::string hours{""};
+};
+
 enum class TextTransform {
   None,
   Uppercase,