Not searching for functions with conventional names.

Reasons:
1. They kind of implement interface.
2. They are too expensive to search.

idea/testData/inspections/unusedSymbol/function/conventionalNames.kt

@@ -0,0 +1,34 @@
+// all these are unused, but have conventional names, so they won't be marked as unused
+
+fun inc() {
+}
+
+fun dec() {
+}
+
+fun component1() {
+}
+
+fun component100() {
+}
+
+fun equals() {
+}
+
+fun invoke() {
+}
+
+fun iterator() {
+}
+
+fun compareTo() {
+}
+
+fun get() {
+}
+
+fun set() {
+}
+
+fun plusAssign() {
+}