[ConstraintSystem] NFC: Remove obsolete `getPotentialBindings` declaration
[ConstraintSystem] NFC: Remove obsolete `getPotentialBindings` declaration

It has been related with `inferBindingsFor` but declaration was
left in the header.

tkremenek/swift,xwu/swift,apple/swift,parkera/swift,benlangmuir/swift,glessard/swift,benlangmuir/swift,tkremenek/swift,rudkx/swift,glessard/swift,xwu/swift,JGiola/swift,apple/swift,parkera/swift,tkremenek/swift,benlangmuir/swift,ahoppen/swift,xwu/swift,hooman/swift,rudkx/swift,jmgc/swift,gregomni/swift,xwu/swift,parkera/swift,xwu/swift,JGiola/swift,glessard/swift,roambotics/swift,apple/swift,jmgc/swift,jmgc/swift,glessard/swift,apple/swift,roambotics/swift,JGiola/swift,atrick/swift,ahoppen/swift,atrick/swift,benlangmuir/swift,gregomni/swift,hooman/swift,rudkx/swift,atrick/swift,apple/swift,JGiola/swift,parkera/swift,parkera/swift,jmgc/swift,gregomni/swift,tkremenek/swift,ahoppen/swift,apple/swift,roambotics/swift,atrick/swift,parkera/swift,ahoppen/swift,gregomni/swift,parkera/swift,xwu/swift,hooman/swift,rudkx/swift,jmgc/swift,jmgc/swift,benlangmuir/swift,hooman/swift,gregomni/swift,roambotics/swift,xwu/swift,atrick/swift,gregomni/swift,hooman/swift,ahoppen/swift,atrick/swift,ahoppen/swift,glessard/swift,roambotics/swift,tkremenek/swift,rudkx/swift,roambotics/swift,rudkx/swift,tkremenek/swift,jmgc/swift,JGiola/swift,hooman/swift,benlangmuir/swift,tkremenek/swift,parkera/swift,JGiola/swift,hooman/swift,glessard/swift