removed visible instructor text

Author: campbelle2

pretext/UnitTesting/WritingUnitTests.ptx

@@ -162,30 +162,7 @@ assert grade(92) == 'A'
 assert grade(85) == 'B'
 assert grade(69) == 'F'
         </input></program>
-                    .. reveal:: ac_grade_unittest_aux_reveal
-                    :instructoronly:
-                    .. actex:: ac_grade_unittest_aux
-                    testA = False
-                    testB = False
-                    testF = False
-                    illegal = False
-                    def grade(score):
-                    global illegal, testA, testB, testF
-                    if score &gt; 100 or score &lt; 0:
-                    illegal = True
-                    return ''
-                    elif score &gt;= 90:
-                    testA = True
-                    return 'A'
-                    elif score &gt;= 80:
-                    testB = True
-                    return 'B'
-                    else:
-                    testF = True
-                    return 'F'
-                
-                    <p>The following asserts are just some of several that could have been used.</p>
-
+                    
 
                     <!--.. reveal:: ac_grade_unittest_aux_reveal-->
                     <!--:instructoronly:-->