Use interleaved even if preserve_none is missing

ConflictSet.cpp

@@ -4917,7 +4917,7 @@ struct __attribute__((visibility("hidden"))) ConflictSet::Impl {
     check::Context context;
     context.readContext.impl = this;
 
-#if __has_attribute(preserve_none) && __has_attribute(musttail)
+#if __has_attribute(musttail)
     if (count == 1) {
       useSequential(reads, result, count, context);
     } else {
@@ -5134,7 +5134,7 @@ struct __attribute__((visibility("hidden"))) ConflictSet::Impl {
     assert(allPointWrites || sorted);
 #endif
 
-#if __has_attribute(preserve_none) && __has_attribute(musttail)
+#if __has_attribute(musttail)
     constexpr bool kEnableInterleaved = true;
 #else
     constexpr bool kEnableInterleaved = false;