deprecating types after colon

compiler/testData/diagnostics/tests/j+k/kt2641.kt

@@ -1,3 +1,5 @@
+// !CHECK_TYPE
+
 package a
 
 import <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.util.Iterator<!>
@@ -9,7 +11,7 @@ fun bar(any: Any): <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.lang.Iterable<Int><!>
     val <!UNUSED_VARIABLE!>c<!> : <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Iterator<String><!>? = null
 
     if (any is <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Iterator<*><!>) {
-        <!DEBUG_INFO_SMARTCAST!>any<!> : <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Iterator<*><!>
+        checkSubtype<<!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Iterator<*><!>>(<!DEBUG_INFO_SMARTCAST!>any<!>)
     }
     any as <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Iterator<*><!>
     return null