Update ISSUE_TEMPLATE.md

Author: jreback

.github/ISSUE_TEMPLATE.md

@@ -1,10 +1,6 @@
-## Pandas Issue Submission Template
+#### Code Sample, a copy-pastable example if possible
 
-This template will help you and us respond to your issues in an efficient and timely manner.
-Please fill out all sections and use [github markdown for code blocks](https://help.github.com/articles/basic-writing-and-formatting-syntax/)
-
-#### Actual Behavior
-
-#### Expected Behavior
+#### Expected Output
 
 #### output of ``pd.show_versions()``
+