Remove commented-out code

Author: tbkka

stdlib/public/runtime/SwiftValue.mm

@@ -430,11 +430,6 @@ - (BOOL)isEqual:(id)other {
     }
   }
 
-//  if (runtime::bincompat::useLegacySwiftObjCHashing()) {
-//    // Legacy behavior only proxies isEqual: for Hashable, not Equatable
-//    return NO;
-//  }
-
   if (auto equatableConformance = selfHeader->getEquatableConformance()) {
     if (auto selfEquatableBaseType = selfHeader->getEquatableBaseType()) {
       auto otherEquatableBaseType = otherHeader->getEquatableBaseType();
@@ -464,11 +459,6 @@ - (NSUInteger)hash {
 	    selfHeader->type, hashableConformance);
   }
 
-//  if (runtime::bincompat::useLegacySwiftObjCHashing()) {
-//    // Legacy behavior doesn't honor Equatable conformance, only Hashable
-//    return (NSUInteger)self;
-//  }
-
   // If Swift type is Equatable but not Hashable,
   // we have to return something here that is compatible
   // with the `isEqual:` above.