Revert "Add stub for new bug template"

This reverts commit f60ad6f309.

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -1,30 +0,0 @@
-name: Bug report
-about: Create a report to help us fix issues.
-labels: "Type: Bug"
-issue_body: true
-body:
-- type: input
-  attributes:
-    label: Application Version
-    description: The version of Cura this issue occurs with.
-    placeholder: 4.8.0
-- type: input
-  attributes:
-    label: Platform
-    description: Information about the operating system the issue occurs on. Include at least the operating system and maybe GPU.
-    placeholder: Windows 10
-  validations:
-    required: true
-- type: input
-  attributes:
-    label: Printer
-    description: Which printer was selected in Cura?
-    placeholder: Ultimaker S5    
-- type: textarea
-  attributes:
-    label: Additional Information
-    description: Extra information relevant to the issue.
-    placeholder: Tell us what you see!
-    value: "A bug happened!"
-  validations:
-    required: true