Verify for unneeded area=yes [validator rule included]

[naoliv]

Could JOSM include a test for undeeded area=yes?
For example, a closed polygon with landuse=residential doesn't need area=yes
nor leisure=park, natural=wood, amenity=parking, building=yes, etc

[naoliv]

Don't know if there is a more elegant way for this, but it should be this:

area:closed[amenity ][area?],
area:closed[building][area?],
area:closed[landuse ][area?],
area:closed[leisure ][area?],
area:closed[natural ][area?],
area:closed[shop    ][area?] {
        throwWarning: tr("unneeded {0}={1} in {2}", "{2.key}", tag("area"), "{1.key}");
        fixRemove: "{2.key}";
}

[simon04]

In 6778/josm:

fix #9614 - Check and remove unnecessary area=yes - patch by naoliv