Delete enhancement-request.md

.github/ISSUE_TEMPLATE/enhancement-request.md

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-name: Enhancement request
-about: Suggest an modification to an existing feature
-title: ''
-labels: enhancement
-assignees: ''
-
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-
-**Is your feature request related to a problem? Please describe.**
-<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
-
-**Describe the solution you'd like**
-<!-- A clear and concise description of what you want to happen. -->
-
-**Describe alternatives you've considered**
-<!-- A clear and concise description of any alternative solutions or features you've considered. -->
-
-**Additional context**
-<!-- Add any other context or screenshots about the feature request here. -->