Cleanup: post-cleanup after deprecation cleanup in compiler

Replace `takeIf { !expr }` with `takeUnless { expr }`.
Cleanup redundant parethesis as in `listOf((expr))`.
Replace `listOf(expr)` with `expr.let(::listOf)` where the former caused significant indentation change.

compiler/tests/org/jetbrains/kotlin/scripts/ScriptTemplateTest.kt

@@ -334,12 +334,10 @@ class TestKotlinScriptDependenciesResolver : TestKotlinScriptDummyDependenciesRe
             when (it) {
                 is DependsOn -> if (it.path == "@{runtime}") listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath) else listOf(File(it.path))
                 is DependsOnTwo -> listOf(it.path1, it.path2).flatMap {
-                    it.let {
-                        when {
-                            it.isBlank() -> emptyList()
-                            it == "@{runtime}" -> listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath)
-                            else -> listOf(File(it))
-                        }
+                    when {
+                        it.isBlank() -> emptyList()
+                        it == "@{runtime}" -> listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath)
+                        else -> listOf(File(it))
                     }
                 }
                 is InvalidScriptResolverAnnotation -> throw Exception("Invalid annotation ${it.name}", it.error)