KT-4820: Intention to remove an unused index variable from a for loop.

idea/testData/intentions/removeForLoopIndicesIntention/inapplicableForLoop.kt

@@ -0,0 +1,6 @@
+//IS_APPLICABLE: FALSE
+fun foo(bar: List<String>) {
+    for (<caret>a in bar) {
+
+    }
+}

idea/testData/intentions/removeForLoopIndicesIntention/inapplicableIndexUse.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: FALSE
+//ERROR: Unresolved reference: withIndices
+fun foo(b: List<Int>) {
+    for ((i, <caret>c) in b.withIndices()) {
+        return i
+    }
+}

idea/testData/intentions/removeForLoopIndicesIntention/loopWithType.kt

@@ -0,0 +1,6 @@
+//ERROR: Unresolved reference: withIndices
+fun foo(bar: List<Int>) {
+    for ((i : <caret>Int, b: Int) in bar.withIndices()) {
+
+    }
+}

idea/testData/intentions/removeForLoopIndicesIntention/loopWithType.kt.after

@@ -0,0 +1,6 @@
+//ERROR: Unresolved reference: withIndices
+fun foo(bar: List<Int>) {
+    for (b: Int in bar) {
+
+    }
+}

idea/testData/intentions/removeForLoopIndicesIntention/simpleLoopWithIndices.kt

@@ -0,0 +1,6 @@
+//ERROR: Unresolved reference: withIndices
+fun foo(bar: List<String>) {
+    for ((i,<caret>a) in bar.withIndices()) {
+
+    }
+}

idea/testData/intentions/removeForLoopIndicesIntention/simpleLoopWithIndices.kt.after

@@ -0,0 +1,6 @@
+//ERROR: Unresolved reference: withIndices
+fun foo(bar: List<String>) {
+    for (a in bar) {
+
+    }
+}