Remove Eclipse Shared Workspaces

Eclipse Shared Workspaces share the same directory as the JDK itself, which does not make much sense since there can be multiple different configurations of the JDK which Eclipse does depend on (as minimalistic as it is), and there is no one true JDK configuration, unlike what this setting suggests. This feature was created when I was much less familiar with the structure of how the JDK handles different builds, and should be removed