xdg-output: Remove and tweak contradicting examples

The "logical size" as stated by the first paragraph corresponds to the monitor size in the global compositor space.

To most clients, this is unnecessary information, and should be ignored, but some used the listed examples to derive information that contradicts the very definition of what this event communicates.

One example tried to add surface size assumptions, which was not correct. Remove this part completely, clients should not try to configure their surface sizes from the logical size of a monitor.

The other is the first list of size examples; it tried to communicate that a compositor sometimes may not scale the viewport of the monitor in its global compositor coordinate space, in which case, the logical size itself matches the actual resolution. Tweak this wording to make that clear.

Signed-off-by: Jonas Ådahl jadahl@gmail.com