Delete clean reference instructions on dereferencing captured variables

Codegen generates clean instructions for ref values (captured vars)
on block exit so we should delete them on dereferencing captured values.

  #KT-17200 FIXED

compiler/testData/codegen/box/closures/capturedVarsOptimization/kt17200.kt

@@ -0,0 +1,26 @@
+inline fun inlineCall(action: () -> Unit) {
+    action()
+}
+
+fun test() {
+    var width = 1
+    inlineCall {
+        width += width
+    }
+}
+
+fun test2() {
+    var width = 1L
+    val newValue = 1;
+    val newValue2 = "123";
+    val newValue3 = 2.0;
+    inlineCall {
+        width += width
+    }
+}
+
+fun box(): String {
+    test()
+    test2()
+    return "OK"
+}