r.object.geometry: remove from addons, it is in G8 core now (#715)

* Update src/imagery/i.segment.stats/i.segment.stats.html

src/imagery/i.segment.stats/i.segment.stats.html

@@ -8,8 +8,8 @@ <h2>DESCRIPTION</h2>
 
 <p>
 Available statistics are those related to the shape, size and position of the
-areas (see the <em><a href="r.object.geometry.html">r.object.geometry</a></em>
-addon man page for more information on the statistics) and aggregated statistics
+areas (see the <em><a href="https://grass.osgeo.org/grass-stable/manuals/r.object.geometry.html">r.object.geometry</a></em>
+man page for more information on the statistics) and aggregated statistics
 of pixel values of other raster maps (see 
 <em><a href="https://grass.osgeo.org/grass-stable/manuals/r.univar.html">r.univar</a></em> for details).
 
@@ -46,10 +46,9 @@ <h2>NOTES</h2>
 
 <p>
 This module is a simple front-end to <em><a href="https://grass.osgeo.org/grass-stable/manuals/r.univar.html">r.univar</a></em>
-and the 
-<em><a href="r.object.geometry.html">r.object.geometry</a></em>
-add-on. It is the user's responsibility to install the
-latter using <em><a href="https://grass.osgeo.org/grass-stable/manuals/g.extension.html">g.extension</a></em>. If other statistics 
+and
+<em><a href="https://grass.osgeo.org/grass-stable/manuals/r.object.geometry.html">r.object.geometry</a></em>.
+If other statistics
 are desired, these should probably be implemented in those (or other) modules
 which can then be called from this module.
 
@@ -87,11 +86,11 @@ <h2>SEE ALSO</h2>
 <em>
 <a href="https://grass.osgeo.org/grass-stable/manuals/i.segment.html">i.segment</a>,
 <a href="https://grass.osgeo.org/grass-stable/manuals/r.univar.html">r.univar</a>,
-<a href="https://grass.osgeo.org/grass-stable/manuals/v.rast.stats.html">v.rast.stats</a> 
+<a href="https://grass.osgeo.org/grass-stable/manuals/v.rast.stats.html">v.rast.stats</a>, 
+<a href="https://grass.osgeo.org/grass-stable/manuals/r.object.geometry.html">r.object.geometry</a>
 </em>
 <p>
 <em>
-<a href="r.object.geometry.html">r.object.geometry (Addon)</a>
 <a href="v.class.mlR.html">v.class.mlR (Addon)</a>
 </em>
 

src/imagery/i.segment.stats/i.segment.stats.py

@@ -188,14 +188,6 @@ def main():
         if (options["area_measures"] and not flags["s"])
         else []
     )
-    if area_measures:
-        if not gscript.find_program("r.object.geometry", "--help"):
-            message = _("You need to install the addon r.object.geometry to be able")
-            message += _(" to calculate area measures.\n")
-            message += _(
-                " You can install the addon with 'g.extension r.object.geometry'"
-            )
-            gscript.fatal(message)
     neighborhood = True if flags["n"] else False
     if neighborhood:
         if not gscript.find_program("r.neighborhoodmatrix", "--help"):