test_isa_retry_flush() in ide-test.c

[Thomas Huth]

 Hi John!

I just notice that test_isa_retry_flush() is not doing anything useful 
anymore: It likely was supposed to run the test_retry_flush() function with 
the "isapc" machine type, but actually test_retry_flush() ignores the 
machine option parameter completely and always uses PCI accessor functions 
nowadays (since commit 9c268f8ae84ae186).
Question is: Is it worth the effort to try to restore the original intended 
behavior for the ISA test here, or shall we rather simply remove it instead 
to save some testing cycles?

 Thomas