hw/isa/pc87312: Remove unused function is_parallel_epp()

The function is_parallel_epp() is unused; remove it.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

hw/isa/pc87312.c

@@ -86,11 +86,6 @@ static inline uint32_t get_parallel_irq(PC87312State *s)
     }
 }
 
-static inline bool is_parallel_epp(PC87312State *s)
-{
-    return s->regs[REG_PTR] & PTR_EPP_MODE;
-}
-
 
 /* UARTs */