Introduce "Redundant else in if" inspection #KT-19668 Fixed

idea/testData/inspectionsLocal/redundantElseInIf/redundant.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+class SomeException : RuntimeException()
+fun foo(): Int = 1
+
+fun test(x: Boolean) {
+    if (x) throw SomeException()
+    else<caret> foo()
+}