Remove obsolete Eclipse project files

Change-Id: I7bb49e02fb630f886cd4415637e2f5dcbc16105c
Reviewed-on: http://review.couchbase.org/24820
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>