Minor. Remove unused CandidateWithBoundDispatchReceiver#copy

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/tower/ImplicitScopeTower.kt

@@ -58,8 +58,6 @@ interface CandidateWithBoundDispatchReceiver {
     val diagnostics: List<ResolutionDiagnostic>
 
     val dispatchReceiver: ReceiverValueWithSmartCastInfo?
-
-    fun copy(newDescriptor: CallableDescriptor): CandidateWithBoundDispatchReceiver
 }
 
 data class ResolutionCandidateStatus(val diagnostics: List<KotlinCallDiagnostic>) {

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/tower/TowerUtils.kt

@@ -41,7 +41,4 @@ internal class CandidateWithBoundDispatchReceiverImpl(
         override val dispatchReceiver: ReceiverValueWithSmartCastInfo?,
         override val descriptor: CallableDescriptor,
         override val diagnostics: List<ResolutionDiagnostic>
-) : CandidateWithBoundDispatchReceiver {
-    override fun copy(newDescriptor: CallableDescriptor) =
-            CandidateWithBoundDispatchReceiverImpl(dispatchReceiver, newDescriptor, diagnostics)
-}
+) : CandidateWithBoundDispatchReceiver