Removed pf4 filter req files, the exact same files are automatically included in optics module.

iocBoot/iocxxx/vxWorks/pf4bank.req

-$(P)$(H)debug$(B)
-$(P)$(H)fPos$(B)
-$(P)$(H)bank$(B)
-$(P)$(H)bitFlag$(B)
-$(P)$(H)status$(B)
-$(P)$(H)f1$(B)
-$(P)$(H)f2$(B)
-$(P)$(H)f3$(B)
-$(P)$(H)f4$(B)
-$(P)$(H)Z1$(B)
-$(P)$(H)Z2$(B)
-$(P)$(H)Z3$(B)
-$(P)$(H)Z4$(B)

iocBoot/iocxxx/vxWorks/pf4common.req

-$(P)$(H)E:local
-$(P)$(H)useMono
-$(P)$(H)filterAl.EGU
-$(P)$(H)filterTi.EGU
-$(P)$(H)filterGlass.EGU