Debugger: remove useless casts from expressions converted from java

idea/testData/debugger/tinyApp/outs/createExpressionSimple.out

@@ -1,7 +1,7 @@
-LineBreakpoint created at createExpressionSimple.kt:14
+LineBreakpoint created at createExpressionSimple.kt:15
 !JDK_HOME!\bin\java -agentlib:jdwp=transport=dt_socket,address=!HOST_NAME!:!HOST_PORT!,suspend=y,server=n -Dfile.encoding=!FILE_ENCODING! -classpath !OUTPUT_PATH!;!KOTLIN_RUNTIME!;!CUSTOM_LIBRARY!;!RT_JAR! createExpressionSimple.CreateExpressionSimpleKt
 Connected to the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
-createExpressionSimple.kt:14
+createExpressionSimple.kt:15
 package createExpressionSimple
 
 class MyClass: Base() {
@@ -14,6 +14,7 @@ open class Base {
 
 fun main(args: Array<String>) {
     val myClass: Base = MyClass()
+    val myBase = Base()
     //Breakpoint!
     val a = 1
 }
@@ -21,12 +22,13 @@ fun main(args: Array<String>) {
 // PRINT_FRAME
 // DESCRIPTOR_VIEW_OPTIONS: NAME_AND_EXPRESSION
 
-
  frame    = main
    local    = args (expression = args)
    local    = myClass (expression = myClass)
      field    = i (expression = (myClass as MyClass).i)
      field    = baseI (expression = (myClass as MyClass).baseI)
+   local    = myBase (expression = myBase)
+     field    = baseI (expression = myBase.baseI)
 Disconnected from the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
 
 Process finished with exit code 0