remove parenthese from function like string

I have a similar string with a C++ function __X

__X(" (whatever1)") alpha __X("whatever2") beta

and I should remove the __X function and the corresponding parentheses, so the result should be

"(whatever1)" alpha "whatever2" beta

The argument to the __X function is a string embedded in "" and sometimes additionally embedded in ()

I'd appreciate any help, thanks in advance