LibJS: Remove unused StringOrSymbol constructors

Author: https://github.com/awesomekling
Commit: 3b5032c4b1
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4067
Reviewed-by: https://github.com/trflynn89

Libraries/LibJS/Runtime/StringOrSymbol.h

@@ -20,16 +20,6 @@ public:
     {
     }
 
-    StringOrSymbol(char const* chars)
-        : StringOrSymbol(DeprecatedFlyString(chars))
-    {
-    }
-
-    StringOrSymbol(ByteString const& string)
-        : StringOrSymbol(DeprecatedFlyString(string))
-    {
-    }
-
     StringOrSymbol(DeprecatedFlyString const& string)
         : m_string(string)
     {