Unused symbol: secondary constructors are also under analysis #KT-10812 Fixed

idea/testData/quickfix/removeUnused/unusedConstructor.kt

@@ -0,0 +1,4 @@
+// "Safe delete constructor" "true"
+class Owner(val x: Int) {
+    <caret>constructor(): this(42)
+}

idea/testData/quickfix/removeUnused/unusedConstructor.kt.after

@@ -0,0 +1,3 @@
+// "Safe delete constructor" "true"
+class Owner(val x: Int) {
+}