Condition of 'if' expression is constant: remove else keyword if needed

#KT-34713 Fixed

idea/testData/inspectionsLocal/constantConditionIf/endWithElseIf2.kt

@@ -0,0 +1,13 @@
+// WITH_RUNTIME
+
+fun main() {
+    foo(true);
+}
+fun foo(someBool:Boolean) {
+    if (someBool) {
+        println("test1");
+    } else if (<caret>false) {
+        println("test2");
+    }
+    println("test3");
+}

idea/testData/inspectionsLocal/constantConditionIf/endWithElseIf2.kt.after

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+
+fun main() {
+    foo(true);
+}
+fun foo(someBool:Boolean) {
+    if (someBool) {
+        println("test1");
+    }
+    println("test3");
+}

idea/testData/inspectionsLocal/constantConditionIf/expressionElseIfBlock2.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+
+fun foo(x: Int) {}
+
+fun bar(s: String?) {
+    if (s == null) {
+        1
+    }
+    else if (<caret>false) {
+        foo(1)
+        2
+    }
+    else {
+        3
+    }
+}

idea/testData/inspectionsLocal/constantConditionIf/expressionElseIfBlock2.kt.after

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+
+fun foo(x: Int) {}
+
+fun bar(s: String?) {
+    if (s == null) {
+        1
+    }
+    else {
+        3
+    }
+}