Revert "some vars need unspecified isolation for initializing exprs"

This reverts commit 386940c.

Author: kavon

lib/AST/Decl.cpp

@@ -8667,23 +8667,10 @@ ActorIsolation swift::getActorIsolationOfContext(DeclContext *dc) {
   if (auto *vd = dyn_cast_or_null<ValueDecl>(dc->getAsDecl()))
     return getActorIsolation(vd);
 
-  // In the context of the initializing or default-value expression of a
-  // stored property, the isolation varies between global and type members:
-  //   - For a static stored property, the isolation matches the VarDecl.
-  //   - For a field of a nominal type, the expression is not isolated.
-  // Without this distinction, a nominal can have non-async initializers
-  // with various kinds of isolation, so an impossible constraint can be
-  // created. See SE-0327 for details.
   if (auto *init = dyn_cast<PatternBindingInitializer>(dc)) {
-    if (auto *var =
-          init->getBinding()->getAnchoringVarDecl(init->getBindingIndex())) {
-
-      if (var->isInstanceMember() &&
-          !var->getAttrs().hasAttribute<LazyAttr>())
-        return ActorIsolation::forUnspecified();
-
+    if (auto *var = init->getBinding()->getAnchoringVarDecl(
+            init->getBindingIndex()))
       return getActorIsolation(var);
-    }
   }
 
   if (auto *closure = dyn_cast<AbstractClosureExpr>(dc)) {