Removed screenshots that weren't formatting properly

README.md

@@ -14,10 +14,6 @@ with GitLab Single-Sign-On.
 - Personalize notifications for unreads and mentions by channel and keyword
 - Use #hashtags to tag and find messages, discussions and files  
-*Screenshot: GitLab Mattermost on Desktop*
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-![alt text](http://www.mattermost.org/wp-content/uploads/2015/06/20150715_mm_desktop2.jpg)
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 #### Archiving and Search
 - Import Slack user accounts and channel archives
@@ -30,10 +26,6 @@ with GitLab Single-Sign-On.
 - Attach sound, video and image files from mobile devices
 - Define team-specific branding and color themes across your devices
-*Screenshot: GitLab Mattermost on Mobile Web*
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-![alt text](http://www.mattermost.org/wp-content/uploads/2015/06/mm_demo.gif)
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 #### Enterprise Compatibility 
 - Self-host Mattermost entirely within your organization's insfrastructure