Remove unused maven-release-plugin. (#635)

Signed-off-by: Sjoerd Talsma <sjoerdtalsma@users.noreply.github.com>

pom.xml

@@ -82,7 +82,6 @@
         <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
         <maven-javadoc-plugin.version>3.10.1</maven-javadoc-plugin.version>
         <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
-        <maven-release-plugin.version>3.1.1</maven-release-plugin.version>
         <maven-shade-plugin.version>3.6.0</maven-shade-plugin.version>
         <build-helper-maven-plugin.version>3.4.0</build-helper-maven-plugin.version>
         <nexus-staging-maven-plugin.version>1.7.0</nexus-staging-maven-plugin.version>
@@ -256,17 +255,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-release-plugin</artifactId>
-                <version>${maven-release-plugin.version}</version>
-                <configuration>
-                    <useReleaseProfile>false</useReleaseProfile>
-                    <releaseProfiles>release</releaseProfiles>
-                    <autoVersionSubmodules>true</autoVersionSubmodules>
-                    <tagNameFormat>@{project.version}</tagNameFormat>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>