Revert "Raise RESERVED_VAR_PROPERTY_OF_VALUE_CLASS to error"

This reverts commit bad197e075.

compiler/testData/codegen/box/reflection/call/inlineClasses/properties.kt

@@ -13,7 +13,6 @@ class C {
     var member: S = S("")
 
     private var suffix = S("")
-    @Suppress("RESERVED_VAR_PROPERTY_OF_VALUE_CLASS")
     var S.memExt: S
         get() = this + suffix
         set(value) { suffix = this + value }
@@ -22,7 +21,6 @@ class C {
 var topLevel: S = S("")
 
 private var suffix = S("")
-@Suppress("RESERVED_VAR_PROPERTY_OF_VALUE_CLASS")
 var S.ext: S
     get() = this + suffix
     set(value) { suffix = this + value }