Delete 20-official-feature-request-issue.md

github/ISSUE_TEMPLATE/20-official-feature-request-issue.md

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-name: Feature Request
-about: Use this template for raising a feature request
-labels: 'type:feature'
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-<em>Please make sure that this is a feature request. As per our [GitHub Policy](https://github.com/jvishnuvardhan/models/blob/master/ISSUES.md), we only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub. tag:feature_template</em>
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-**System information**
-- TensorFlow version (you are using):
-- Are you willing to contribute it (Yes/No):
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-**What is the top-level directory of the model you are using?**
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-**Describe the feature and the current behavior/state.**
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-**Will this change the current api? How?**
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-**Who will benefit with this feature?**
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-**Any Other info.**