Delete old issue template

.github/ISSUE_TEMPLATE.md

@@ -1,73 +0,0 @@
-<!--
-  - Thanks for opening an issue for us!  Before you open an issue,
-  - please check if a similar issue exists or has been closed before.
-  -
-  - If you're asking a question about how to use Blockly in your application,
-  - please ask questions on the mailing list, instead of filing issues:
-  -       https://groups.google.com/forum/#!forum/blockly
-  -->
-
-### Problem statement
-
-<!-- TODO: Please describe the problem.
-  -        Is it a bug report (something didn't work the way you expected),
-  -        or a feature request (something new you think would improve Blockly)?
-  -->
-
-### Expected Behavior
-
-<!-- TODO: Please describe what should happen.
-  -        Include screenshots if applicable.
-  -->
-
-### Actual Behavior
-
-<!--  TODO: Describe what actually happens.
-  -         Include screenshots if applicable.
-  -->
-
-### Steps to Reproduce
-
-<!-- TODO: Explain what someone needs to do in order to see
-  -        what's described in *Actual behavior* above
-  -->
-
-1. Start by..
-2. Next, do..
-
-### Stack Traces
-
-<!-- TODO: Please open up the console.  If you see any Blockly-related errors,
-  -        paste them between the quotes below.
-  -
-  - Ignore any instances of...
-  - "Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause()."
-  -->
-
-```
-Replace with error stack trace.
-```
-
-### Operating System and Browser
-
-<!-- TODO: If this issue is browser specific, uncomment the systems you have tested. -->
-
-<!-- * Desktop Chrome -->
-<!-- * Desktop Firefox -->
-<!-- * Desktop Safari -->
-<!-- * Desktop Opera -->
-<!-- * Windows Internet Explorer 10 -->
-<!-- * Windows Internet Explorer 11 -->
-<!-- * Windows Edge -->
-
-<!--
-* Smartphone/Tablet/Chromebook (please complete the following information):
-  * Device: [e.g. iPhone6]
-  * OS: [e.g. iOS8.1]
-  * Browser [e.g. stock browser, safari]
-  * Version [e.g. 22]
--->
-
-### Additional Information
-
-<!-- Anything else we should know? -->