Related to KT-20631: don't report redundant blank Unit in lambda

idea/testData/inspectionsLocal/redundantUnitExpression/lambda.kt

@@ -0,0 +1,12 @@
+// PROBLEM: none
+
+fun <T> run(f: () -> T) = f()
+
+fun foo(s: String) = s
+
+fun test() {
+    run {
+        foo("Hello")
+        <caret>Unit
+    }
+}