Remove confusing "full grade" from output.

Author: papajohn

gofer/ok.py

@@ -163,7 +163,7 @@ class OKTestsResult:
     <strong>Grade: {{ grade }}</strong>
     {% endif %}
     {% if grade == 1.0 %}
-        <p>All tests passed! Full grade.</p>
+        <p>All tests passed!</p>
     {% else %}
         <p>{{ passed_tests|length }} of {{ tests|length }} tests passed</p>
         {% if passed_tests %}