Removing screenSize

[#72970146]
Disabling unreliableSimpleMessageTest

[#72970146]
remove some this statements
Merge pull request #56 from sanity/slight-cleanup-to-demonstrate-code-reviews

remove some this statements
Merge pull request #55 from sanity/fix-bug-causing-travisCI-to-fail-72970146

Fix bug causing travis ci to fail 72970146
we're not using vaadin anymore
Merge branch 'master' into Tahrir-api-72723708