Remove unnecessary badge for issues

The badge only renders in the project, as it exists in GitHub, where the
open issues can be seen in the UI. So, this badge is just bloat.

README.md

@@ -1,8 +1,9 @@
 formatter-maven-plugin
 ======================
 
-[![mvn verify][ci_img]][ci_link] [![Maven Central][maven_img]][maven_link]
-[![Issues][issues_img]][issues_link] [![Apache License][license_img]][license_link]
+[![mvn verify][ci_img]][ci_link]
+[![Maven Central][maven_img]][maven_link]
+[![Apache License][license_img]][license_link]
 
 This project provides a mechanism to automatically (re)format your [Maven]
 project during a Maven build, or to verify its formatting, so that your project
@@ -43,8 +44,6 @@ versions of this plugin and their corresponding Eclipse versions.
 [ci_link]: https://github.com/revelc/formatter-maven-plugin/actions
 [compat]: https://github.com/revelc/formatter-maven-plugin/wiki/Eclipse-Version-Compatibility
 [formatter-m2e-configurator]: https://github.com/revelc/formatter-m2e-configurator
-[issues_img]: https://img.shields.io/github/issues/revelc/formatter-maven-plugin.svg
-[issues_link]: https://github.com/revelc/formatter-maven-plugin/issues
 [license_img]: http://img.shields.io/badge/license-ASL-blue.svg
 [license_link]: https://github.com/revelc/formatter-maven-plugin/blob/main/LICENSE
 [m2e]: https://eclipse.org/m2e