refactor(parser): remove unnecessary allocator include from symbol.hxx

Author: Reim-developer

wheel_parser/include/wheel_parser/ast/symbol.hxx

@@ -8,7 +8,6 @@
 #include <unordered_map>
 #include <utility>
 #include "wheel_parser/config.hxx"
-#include "wheel_parser/allocator.hxx"
 
 WHEEL_PARSER_AST_NAMESPACE
     using SymbolID = uint32_t;