deprecating types after colon

compiler/testData/diagnostics/tests/thisAndSuper/thisInFunctionLiterals.kt

@@ -1,16 +1,18 @@
+// !CHECK_TYPE
+
 class A(val a:Int) {
   inner class B() {
     fun Char.xx() : Double.() -> Any {
-      this : Char
+      checkSubtype<Char>(this)
       val <!UNUSED_VARIABLE!>a<!>: Double.() -> Unit = {
-        this : Double
-        this@xx : Char
-        this@B : B
-        this@A : A
+        checkSubtype<Double>(this)
+        checkSubtype<Char>(this@xx)
+        checkSubtype<B>(this@B)
+        checkSubtype<A>(this@A)
       }
-      val <!UNUSED_VARIABLE!>b<!>: Double.() -> Unit = a@{ this@a : Double + this@xx : Char}
-      val <!UNUSED_VARIABLE!>c<!> = a@{ -> <!NO_THIS!>this@a<!> <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> this@xx : Char}
-      return (a@{this@a : Double + this@xx : Char})
+      val <!UNUSED_VARIABLE!>b<!>: Double.() -> Unit = a@{ checkSubtype<Double>(this@a) + checkSubtype<Char>(this@xx) }
+      val <!UNUSED_VARIABLE!>c<!> = a@{ -> <!NO_THIS!>this@a<!> <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> checkSubtype<Char>(this@xx) }
+      return (a@{checkSubtype<Double>(this@a) + checkSubtype<Char>(this@xx)})
     }
   }
 }