docs: Remove unnecessary lines in README (#927)

Author: mbfakourii

README.md

@@ -42,6 +42,4 @@ This project exists thanks to all the people who contribute... we'd love to see
   <img src="https://contrib.rocks/image?repo=parse-community/Parse-SDK-Flutter" />
 </a>
 
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 [open-collective-link]: https://opencollective.com/parse-server

packages/dart/README.md

@@ -47,10 +47,7 @@ Find the full documentation in the [Parse Dart SDK guide][guide].
 
 ## Contributing
 
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 We want to make contributing to this project as easy and transparent as possible. Please refer to the [Contribution Guidelines](../../CONTRIBUTING.md).
 
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 [guide]: https://docs.parseplatform.org/dart/guide/
 [open-collective-link]: https://opencollective.com/parse-server

packages/flutter/README.md

@@ -49,7 +49,5 @@ Find the full documentation in the [Parse Flutter SDK guide][guide].
 
 We want to make contributing to this project as easy and transparent as possible. Please refer to the [Contribution Guidelines](../../CONTRIBUTING.md).
 
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 [guide]: https://docs.parseplatform.org/flutter/guide/
 [open-collective-link]: https://opencollective.com/parse-server