Merge pull request #3083 from segmentio/niall/remove_ios_ua

Remove user agent for ios

Author: stayseesong

src/connections/spec/common.md

@@ -276,10 +276,10 @@ Other libraries only collect `context.library`, any other context variables must
 | screen.height            |              | ✅             | ✅                 |
 | screen.width             |              | ✅             | ✅                 |
 | traits                   |              | ✅             | ✅                 |
-| userAgent                | ✅            | ✅             | ✅                 |
+| userAgent                | ✅            |              | ✅                 |
 | timezone                 |              | ✅             | ✅                 |
 
-- IP Address is not collected by Segment's libraries, but instead filled in by Segmen'ts servers when it receives a message for **client side events only**.
+- IP Address isn't collected by Segment's libraries, but is instead filled in by Segment's servers when it receives a message for **client side events only**.
 - The Android library collects `screen.density` with [this method](/docs/connections/spec/common/#context-fields-automatically-collected).
 
 ## Integrations