Revert "Add release plugin"

This reverts commit ddb47ac

Author: mrotteveel

devdoc/deploy.md

@@ -5,23 +5,11 @@ Make sure that JAVA_HOME points to Java 8 (the javadoc task fails with Java 11).
 
 To deploy to Maven use
 
-```
-mvn release:clean release:prepare
-```
-
-followed by
-
-```
-mvn release:perform
-```
-
-Or make the changes manually and use
-
 ```
 mvn clean deploy -P release
 ```
 
-For snapshots we can skip signing and generating javadoc + sources using:
+For snapshots we can forego signing and generating javadoc + sources using:
 
 ```
 mvn clean deploy

pom.xml

@@ -122,17 +122,6 @@
                     <autoReleaseAfterClose>true</autoReleaseAfterClose>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-release-plugin</artifactId>
-                <version>2.5.3</version>
-                <configuration>
-                    <autoVersionSubmodules>true</autoVersionSubmodules>
-                    <useReleaseProfile>false</useReleaseProfile>
-                    <releaseProfiles>release</releaseProfiles>
-                    <goals>deploy</goals>
-                </configuration>
-            </plugin>
         </plugins>
     </build>