Removed old global course settings file.

lms/djangoapps/courseware/global_course_settings.py

-GRADER = [
-    {
-        'type' : "Homework",
-        'min_count' : 12,
-        'drop_count' : 2,
-        'short_label' : "HW",
-        'weight' : 0.15,
-    },
-    {
-        'type' : "Lab",
-        'min_count' : 12,
-        'drop_count' : 2,
-        'category' : "Labs",
-        'weight' : 0.15
-    },
-    {
-        'type' : "Midterm",
-        'name' : "Midterm Exam",
-        'short_label' : "Midterm",
-        'weight' : 0.3,
-    },
-    {
-        'type' : "Final",
-        'name' : "Final Exam",
-        'short_label' : "Final",
-        'weight' : 0.4,
-    }
-]