Remove check "unused secondary enum class constructor"

#KT-14040 Fixed

idea/testData/inspectionsLocal/unusedSymbol/enumSecondaryConstructor.kt

@@ -0,0 +1,12 @@
+// PROBLEM: none
+enum class MyEnum(val i: Int) {
+    HELLO(42),
+    WORLD("42")
+    ;
+
+    constructor<caret>(s: String): this(42)
+}
+
+fun test() {
+    MyEnum.HELLO
+}