remove old deskshare module and out-dated Java checks

bigbluebutton-client/build.xml

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/prod/BigBlueButton.html

bigbluebutton-client/resources/prod/DeskshareStandalone.html

bigbluebutton-client/resources/prod/EmbedBigBlueButton.html

bigbluebutton-client/resources/prod/lib/bbb_api_bridge.js

bigbluebutton-client/resources/prod/lib/bbb_deskshare.js

bigbluebutton-client/resources/prod/lib/deployJava.js

bigbluebutton-client/src/DeskShareModule.mxml

bigbluebutton-client/src/DeskshareStandalone.mxml

bigbluebutton-client/src/ScreenshareStandalone.mxml

...nt/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as

.../bigbluebutton/modules/deskshare/assets/images/Cursor.png

...bigbluebutton/modules/deskshare/assets/images/Cursor2.png

...bigbluebutton/modules/deskshare/assets/images/cursor3.png

...bigbluebutton/modules/deskshare/assets/images/cursor4.png

...bluebutton/modules/deskshare/events/AppletStartedEvent.as

...org/bigbluebutton/modules/deskshare/events/CursorEvent.as

.../modules/deskshare/events/DeskshareAppletLaunchedEvent.as

...org/bigbluebutton/modules/deskshare/events/ModuleEvent.as