Revert "SILGen: Fix emission of default witness tables for mutable properties"

This reverts commit 1d49756.

Author: benlangmuir

lib/SILGen/SILGenDecl.cpp

@@ -1913,10 +1913,6 @@ class SILGenDefaultWitnessTable
     ConcreteDeclRef witness = Proto->getDefaultWitness(d);
     if (!witness) {
       addMissingDefault();
-      if (d->isSettable(d->getDeclContext()))
-        addMissingDefault();
-      if (d->getMaterializeForSetFunc())
-        addMissingDefault();
       return;
     }
 

test/SILGen/protocol_resilience.swift

@@ -94,7 +94,6 @@ public protocol ResilientStorage {
   associatedtype T : ResilientConstructors
 
   var propertyWithDefault: Int { get }
-  var propertyWithNoDefault: Int { get }
   var mutablePropertyWithDefault: Int { get set }
   var mutablePropertyNoDefault: Int { get set }
   var mutableGenericPropertyWithDefault: T { get set }
@@ -250,16 +249,13 @@ protocol InternalProtocol {
 // CHECK-NEXT: }
 
 // CHECK-LABEL: sil_default_witness_table ResilientStorage {
-// CHECK-NEXT:   no_default
-// CHECK-NEXT:   no_default
+// CHECK-NEXT:  no_default
+// CHECK-NEXT:  no_default
 // CHECK-NEXT:   method #ResilientStorage.propertyWithDefault!getter.1: @_TFP19protocol_resilience16ResilientStorageg19propertyWithDefaultSi
-// CHECK-NEXT:   no_default
 // CHECK-NEXT:   method #ResilientStorage.mutablePropertyWithDefault!getter.1: @_TFP19protocol_resilience16ResilientStorageg26mutablePropertyWithDefaultSi
 // CHECK-NEXT:   method #ResilientStorage.mutablePropertyWithDefault!setter.1: @_TFP19protocol_resilience16ResilientStorages26mutablePropertyWithDefaultSi
 // CHECK-NEXT:   method #ResilientStorage.mutablePropertyWithDefault!materializeForSet.1: @_TFP19protocol_resilience16ResilientStoragem26mutablePropertyWithDefaultSi
 // CHECK-NEXT:   no_default
-// CHECK-NEXT:   no_default
-// CHECK-NEXT:   no_default
 // CHECK-NEXT:   method #ResilientStorage.mutableGenericPropertyWithDefault!getter.1: @_TFP19protocol_resilience16ResilientStorageg33mutableGenericPropertyWithDefaultwx1T
 // CHECK-NEXT:   method #ResilientStorage.mutableGenericPropertyWithDefault!setter.1: @_TFP19protocol_resilience16ResilientStorages33mutableGenericPropertyWithDefaultwx1T
 // CHECK-NEXT:   method #ResilientStorage.mutableGenericPropertyWithDefault!materializeForSet.1: @_TFP19protocol_resilience16ResilientStoragem33mutableGenericPropertyWithDefaultwx1T