refactor(scroll): merge into ion-content

angular/BREAKING.md

@@ -44,6 +44,7 @@ A list of the breaking changes introduced to each component in Ionic Angular v4.
 - [Radio](#radio)
 - [Range](#range)
 - [Refresher](#refresher)
+- [Scroll](#scroll)
 - [Segment](#segment)
 - [Select](#select)
 - [Spinner](#spinner)
@@ -1113,6 +1114,23 @@ The `enabled` property (with a default value of `true`) has been renamed to `dis
 </ion-refresher>
 ```
 
+## Scroll
+
+`ion-scroll` has been removed, fortunatelly `ion-content` can work as a drop-in replacement:
+
+```diff
+- <ion-scroll scrollX="true">
++ <ion-content scrollX="true">
+```
+
+Another very good option is to style a `div` to become scrollable using CSS:
+
+```css
+div.scrollable {
+  overflow: scroll
+}
+```
+
 
 ## Segment