Update README.md

Author: qoomon

README.md

@@ -3,7 +3,6 @@
 [![Maven Central](https://img.shields.io/maven-central/v/me.qoomon/maven-git-versioning-extension.svg)](https://search.maven.org/artifact/me.qoomon/maven-git-versioning-extension)
 [![Changelog](https://badgen.net/badge/changelog/%E2%98%85/blue)](CHANGELOG.md)
 [![Build Workflow](https://github.com/qoomon/maven-git-versioning-extension/workflows/Build/badge.svg)](https://github.com/qoomon/maven-git-versioning-extension/actions?query=workflow%3ABuild)
-[![LGTM Grade](https://img.shields.io/lgtm/grade/java/github/qoomon/maven-git-versioning-extension)](https://lgtm.com/projects/g/qoomon/maven-git-versioning-extension)
 
 **ℹ Also available as [Gradle Plugin](https://github.com/qoomon/gradle-git-versioning-plugin)**