axis.py restore redraw_dro()

History:
1) commit b2855e46 (Apr 2016) modified axis.py:redraw_dro()
   to remove items of the dro display tab as part
   of extensive JA work of that time:
    "axis.py: abandon DRO tab home&limit indicators JA"

2) commit 3b0eb77 was merged to the master branch
   when incorporating reverse run functionality.
   This commit claims whitespace only changes to axis.py:
      "axis: whitespace only"
   However, the fix of merge conflicts:
      "EDIT: fix merge conflicts 12 Dec 2018"
   inadvertently restored some obsoleted code
   in redraw_dro().
   The obsoleted code predates b2855e46 probably
   indicating that the reverse run branch
   had not been updated for the redraw_dro() changes
   making for a confusing merge.

3) This commit restores axis.py:redraw_dro() to agree
   with current 2.8 branch (at commit 36820175f)

src/emc/usr_intf/axis/scripts/axis.py

@@ -603,18 +603,6 @@ class MyOpengl(GlCanonDraw, Opengl):
 
         text.delete("0.0", "end")
         t = droposstrs[:]
-        i = 0
-        for ts in t:
-            if i < len(homed) and homed[i]:
-                t[i] += "*"
-            else:
-                t[i] += " "
-            if i < len(homed) and limit[i]:
-                t[i] += "!" # !!!1!
-            else:
-                t[i] += " "
-            i+=1
-
         text.insert("end", "\n".join(t))
 
         window_height = text.winfo_height()