deprecating types after colon

idea/testData/checker/regression/Jet53.kt

@@ -1,3 +1,5 @@
 import java.util.Collections
 
-val ab = Collections.emptyList<Int>() : List<Int>?
+fun <T> checkSubtype(t: T) = t
+
+val ab = checkSubtype<List<Int>?>(Collections.emptyList<Int>())

idea/testData/checker/regression/ScopeForSecondaryConstructors.kt

@@ -1,18 +1,20 @@
-  class Foo(var bar : Int, var barr : Int, var barrr : Int) {
-    init {
-      bar = 1
-      barr = 1
-      barrr = 1
-      1 : Int
-      this : Foo
-    }
+fun <T> checkSubtype(t: T) = t
 
-    init {
-      bar = 1
-      this.bar
-      1 : Int
-      val <warning>a</warning> : Int =1
-      this : Foo
-    }
+class Foo(var bar : Int, var barr : Int, var barrr : Int) {
+  init {
+    bar = 1
+    barr = 1
+    barrr = 1
+    checkSubtype<Int>(1)
+    checkSubtype<Foo>(this)
   }
 
+  init {
+    bar = 1
+    this.bar
+    checkSubtype<Int>(1)
+    val <warning>a</warning> : Int =1
+    checkSubtype<Foo>(this)
+  }
+}
+