Remove duplicate semantic labeling from issue templates (#5114)

- Remove [Bug] and [Feature] prefixes from titles
- Remove enhancement label from feature template

Fixes #5100

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -1,6 +1,6 @@
 name: Bug Report
 description: 'Report something that is not working correctly'
-title: '[Bug]: '
+title: ''
 labels: ['Potential Bug']
 type: Bug
 

.github/ISSUE_TEMPLATE/feature-request.yaml

@@ -1,7 +1,7 @@
 name: Feature Request
 description: Report a problem or limitation you're experiencing
-title: '[Feature]: '
+title: ''
-labels: ['enhancement']
+labels: []
 type: Feature
 
 body: