Revert "Raise RESERVED_VAR_PROPERTY_OF_VALUE_CLASS to error"

This reverts commit bad197e075.

compiler/testData/codegen/box/inlineClasses/interfaceDelegation/memberExtVarDelegationWithInlineClassParameterTypes.kt

@@ -6,7 +6,6 @@ import kotlin.test.assertEquals
 inline class S(val xs: Array<String>)
 
 interface IFoo {
-    @Suppress("RESERVED_VAR_PROPERTY_OF_VALUE_CLASS")
     var S.extVar: String
 }
 
@@ -15,14 +14,12 @@ interface GFoo<T> {
 }
 
 object FooImpl : IFoo {
-    @Suppress("RESERVED_VAR_PROPERTY_OF_VALUE_CLASS")
     override var S.extVar: String
         get() = xs[0]
         set(value) { xs[0] = value }
 }
 
 object GFooImpl : GFoo<S> {
-    @Suppress("RESERVED_VAR_PROPERTY_OF_VALUE_CLASS")
     override var S.extVar: String
         get() = xs[0]
         set(value) { xs[0] = value }