Adjust testData to CharSequence.length transformation

idea/testData/inspections/unusedReceiverParameter/calledInFunction.kt

@@ -1,3 +1,3 @@
 fun String.foo() {
-    println(length())
+    println(length)
 }

idea/testData/inspections/unusedReceiverParameter/implicitReceiverOfExtensionFunction.kt

@@ -2,4 +2,4 @@ private fun String.foo() {
     otherExt()
 }
 
-fun String.otherExt() = length()
+fun String.otherExt() = length

idea/testData/inspections/unusedReceiverParameter/irrelevantCallInFunction.kt

@@ -1,5 +1,5 @@
 fun String.foo() {
     fun String.local() {
-        println(length())
+        println(length)
     }
 }

idea/testData/inspections/unusedReceiverParameter/usedInProperty.kt

@@ -1,5 +1,5 @@
 val String.doubleLength: Int
-    get() = length() * 2
+    get() = length * 2
 
 fun main(args: Array<String>) {
     "".doubleLength