Skip gpg signing for the maven workflow.

Author: camporter

.github/workflows/maven.yml

@@ -19,4 +19,4 @@ jobs:
           distribution: 'temurin'
           java-version: ${{matrix.java}}
       - name: Build with Maven
-        run: mvn verify -B -e -V --file pom.xml
+        run: mvn verify -B -e -V --file pom.xml -Dgpg.skip=true

pom.xml

@@ -46,12 +46,6 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>8</java.version>
   </properties>
-  <repositories>
-    <repository>
-      <id>jcenter</id>
-      <url>https://jcenter.bintray.com/</url>
-    </repository>
-  </repositories>
   <distributionManagement>
     <snapshotRepository>
       <id>ossrh</id>