backport of https://trac.osgeo.org/grass/changeset/63315

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@63316 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/d.correlate/d.correlate.py

@@ -32,11 +32,6 @@ from grass.script.utils import try_remove
 from grass.script import core as grass
 
 def main():
-    env = grass.gisenv()
-    mon = env.get('MONITOR', None)
-    if not mon:
-        grass.fatal(_("No graphics device selected. Use d.mon to select graphics device."))
-
     layers = options['map'].split(',')
 
     if len(layers) < 2:

scripts/d.rast.leg/d.rast.leg.py

@@ -81,11 +81,6 @@ def make_frame(f, b, t, l, r):
     os.environ['GRASS_RENDER_FRAME'] = s
 
 def main():
-    env = grass.gisenv()
-    mon = env.get('MONITOR', None)
-    if not mon:
-        grass.fatal(_("No graphics device selected. Use d.mon to select graphics device."))
-
     map = options['map']
     nlines = options['lines']
     rast = options['raster']

scripts/d.vect.thematic/d.vect.thematic.py

@@ -231,11 +231,6 @@ def out(fh, vars, tmpl):
 def main():
     global tmp_graph, tmp_group, tmp_psmap, tmp_psleg, tmp_gisleg
 
-    env = grass.gisenv()
-    mon = env.get('MONITOR', None)
-    if not mon:
-        grass.fatal(_("No graphics device selected. Use d.mon to select graphics device."))
-
     breakpoints = options['breakpoints']
     colorscheme = options['colorscheme']
     column = options['column']