removed AutoCastReceiver

check subtype for receiver by AutoCastUtils.isSubTypeByAutoCast directly
 #KT-4403 Fixed
 #KT-4415 Fixed

compiler/testData/diagnostics/tests/smartCasts/inference/kt4403.kt

@@ -0,0 +1,11 @@
+//KT-4403 Wrong "type mismatch" on smart cast with inference
+
+trait A
+trait B : A
+
+fun <T> T.f(): T = this
+
+fun test(a: A) {
+    if (a !is B) return
+    val <!UNUSED_VARIABLE!>c<!> = <!DEBUG_INFO_AUTOCAST!>a<!>.f() // type mismatch
+}

compiler/testData/diagnostics/tests/smartCasts/inference/kt4415.kt

@@ -0,0 +1,17 @@
+//KT-4415 Class Auto-Cast Bug
+
+trait SelfJson
+
+object A {
+    fun find(<!UNUSED_PARAMETER!>clz<!>:Class<*>){  }
+
+    fun toJson2(obj:Any){
+        if(obj is SelfJson){
+            // A.find( (obj as SelfJson).javaClass)  // OK
+            A.find( <!DEBUG_INFO_AUTOCAST!>obj<!>.javaClass )   // ERROR:  Type mismatch: inferred type is jet.Any but SelfJson was expected
+        }
+    }
+}
+
+//from library
+val <T> T.javaClass : Class<T> get() = throw Exception()

compiler/testData/diagnostics/tests/smartCasts/kt1461.kt

@@ -7,8 +7,8 @@ class Sub(str : String) : Super(str) {}
 
 fun foo(sup : Super, sub : Sub) {
     if (sup is Sub) {
-        println("${<!DEBUG_INFO_AUTOCAST!>sup<!>.property}")
-        println(<!DEBUG_INFO_AUTOCAST!>sup<!>.property)
+        println("${sup.property}")
+        println(sup.property)
     }
     println("${sub.property}")
     println(sub.property)