pygrass grid: fix the right name parameter to remove raster

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62928 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/python/pygrass/modules/grid/grid.py

@@ -598,4 +598,4 @@ class GridModule(object):
         if self.inlist:
             grm = Module('g.remove')
             for key in self.inlist:
-                grm(flags='f', type='rast', pattern=self.inlist[key])
+                grm(flags='f', type='rast', name=self.inlist[key])