removing xmipp_graph env

Author: albertmena

src/xmipp/bindings/python/envs_DLTK/xmipp_graph.yml

@@ -27,9 +27,5 @@
     "requirements": os.path.join(_REQUIREMENT_PATH, 'xmipp_DLTK_v1.0.yml'),
     "xmippEnviron": True
   },
-  
-  "xmipp_graph": {
-    "requirements": os.path.join(_REQUIREMENT_PATH, 'xmipp_graph.yml'),
-    "xmippEnviron": True
-  },
+
 }