deprecating types after colon

compiler/testData/diagnostics/tests/numbers/doublesInSimpleConstraints.kt

@@ -1,3 +1,5 @@
+// !CHECK_TYPE
+
 package a
 
 fun <T> id(t: T): T = t
@@ -8,13 +10,13 @@ fun test() {
     val <!UNUSED_VARIABLE!>a<!>: Float = id(2.0.toFloat())
 
     val b = id(2.0)
-    b: Double
+    checkSubtype<Double>(b)
 
     val c = either<Number>(1, 2.3)
-    c: Number
+    checkSubtype<Number>(c)
 
     val d = either(11, 2.3)
-    d: Any
+    checkSubtype<Any>(d)
 
     val <!UNUSED_VARIABLE!>e<!>: Float = <!TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH!>id<!>(1)
 }