Eolian @properties should be documented at the property level, and
documentation at the setter or getter level should be left to setter-
or getter-specific comments. There is usually no need at all to have
setter- or getter- specific comments.
Also, a property is not a method so descriptions should match that.
This patch removes lots of duplicated text, and will allow enabling
by default the eolian check that ensures that properties have proper
property-level docs.
No functional changes.
