Update mobile.md

Remove repeated table of contents in spec

Author: joshpaulchan

src/connections/spec/mobile.md

@@ -20,39 +20,21 @@ These events pair nicely with Segment's [ecommerce spec](/docs/connections/spec/
 
 The Segment Native Mobile Spec includes the following semantic events:
 
-**Application Lifecycle Events**
-- [Overview of events](#overview-of-events)
-- [Lifecycle events](#lifecycle-events)
-  - [Application Installed](#application-installed)
-  - [Application Opened](#application-opened)
-  - [Application Backgrounded](#application-backgrounded)
-  - [Application Updated](#application-updated)
-  - [Application Uninstalled](#application-uninstalled)
-  - [Application Crashed](#application-crashed)
-- [Campaign events](#campaign-events)
-  - [Install Attributed](#install-attributed)
-  - [Push Notification Received](#push-notification-received)
-  - [Push Notification Tapped](#push-notification-tapped)
-  - [Push Notification Bounced](#push-notification-bounced)
-  - [Deep Link Opened](#deep-link-opened)
-  - [Deep Link Clicked](#deep-link-clicked)
-
-**Campaign Events**
-- [Overview of events](#overview-of-events)
-- [Lifecycle events](#lifecycle-events)
-  - [Application Installed](#application-installed)
-  - [Application Opened](#application-opened)
-  - [Application Backgrounded](#application-backgrounded)
-  - [Application Updated](#application-updated)
-  - [Application Uninstalled](#application-uninstalled)
-  - [Application Crashed](#application-crashed)
-- [Campaign events](#campaign-events)
-  - [Install Attributed](#install-attributed)
-  - [Push Notification Received](#push-notification-received)
-  - [Push Notification Tapped](#push-notification-tapped)
-  - [Push Notification Bounced](#push-notification-bounced)
-  - [Deep Link Opened](#deep-link-opened)
-  - [Deep Link Clicked](#deep-link-clicked)
+[**Application Lifecycle Events**](#lifecycle-events)
+- [Application Installed](#application-installed)
+- [Application Opened](#application-opened)
+- [Application Backgrounded](#application-backgrounded)
+- [Application Updated](#application-updated)
+- [Application Uninstalled](#application-uninstalled)
+- [Application Crashed](#application-crashed)
+
+[**Campaign Events**](#campaign-events)
+- [Install Attributed](#install-attributed)
+- [Push Notification Received](#push-notification-received)
+- [Push Notification Tapped](#push-notification-tapped)
+- [Push Notification Bounced](#push-notification-bounced)
+- [Deep Link Opened](#deep-link-opened)
+- [Deep Link Clicked](#deep-link-clicked)
 
 
 Segment recommends using the above event names if you're going to be integrating the events yourself. This will ensure that they can be mapped effectively in downstream tools.