.github: remove issue templates

Developers prefer no template based on Slack poll.

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -1,40 +0,0 @@
-name: Bug Report
-description: Report a bug encountered while using Coder.
-labels: bug
-body:
-  - type: textarea
-    id: problem
-    attributes:
-      label: What happened?
-      description: |
-        Please provide as much info as possible. Not doing so may result in your bug not being addressed in a timely manner.
-        If this matter is security related, please disclose it privately via https://coder.com/security
-    validations:
-      required: true
-
-  - type: textarea
-    id: expected
-    attributes:
-      label: What did you expect to happen?
-    validations:
-      required: true
-
-#  - type: textarea
-#    id: repro
-#    attributes:
-#      label: How can we reproduce it (as minimally and precisely as possible)?
-#
-#  - type: textarea
-#    id: additional
-#    attributes:
-#      label: Anything else we need to know?
-#
-#  - type: textarea
-#    id: coderVersion
-#    attributes:
-#      label: Coder version
-#      value: |
-#        ```console
-#        $ coder version
-#        # paste output here
-#        ```

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +0,0 @@
-blank_issues_enabled: true
-contact_links:
-  - name: Contact Sales
-    url: https://coder.com/demo
-    about: Request a demo of Coder Enterprise.

.github/ISSUE_TEMPLATE/enhancement.yml

@@ -1,15 +0,0 @@
-name: Enhancement
-description: Provide supporting details to request development of a feature.
-labels: enhancement
-body:
-  - type: textarea
-    id: feature
-    attributes:
-      label: What would you like to be added?
-    validations:
-      required: true
-
-  - type: textarea
-    id: rationale
-    attributes:
-      label: Why is this needed?

.github/ISSUE_TEMPLATE/feedback.yml

@@ -1,10 +0,0 @@
-name: Feedback
-description: Share your experience with us.
-labels: feedback
-body:
-  - type: textarea
-    id: feature
-    attributes:
-      label: What would you like share?
-    validations:
-      required: true