Adjust testData to CharSequence.length transformation

idea/testData/quickfix/expressions/removeUselessCastInParens.kt

@@ -1,7 +1,7 @@
 // "Remove cast" "true"
 fun test(x: Any): Int {
     if (x is String) {
-        return (x <caret>as String).length()
+        return (x <caret>as String).length
     }
     return -1
 }

idea/testData/quickfix/expressions/removeUselessCastInParens.kt.after

@@ -1,7 +1,7 @@
 // "Remove cast" "true"
 fun test(x: Any): Int {
     if (x is String) {
-        return x.length()
+        return x.length
     }
     return -1
 }

idea/testData/quickfix/expressions/unnecessaryNonNullAssertion3.kt

@@ -1,4 +1,4 @@
 // "Remove unnecessary non-null assertion (!!)" "true"
 fun test(value : String) : Int {
-    return value<caret>!!.length()
+    return value<caret>!!.length
 }

idea/testData/quickfix/expressions/unnecessaryNonNullAssertion3.kt.after

@@ -1,4 +1,4 @@
 // "Remove unnecessary non-null assertion (!!)" "true"
 fun test(value : String) : Int {
-    return value<caret>.length()
+    return value<caret>.length
 }