Revert "Revert "3.0 extract server docs""

This reverts commit 7fe3b8f.

The original change was good, but the merge into 3.1 was extremely
difficult and was abandoned. This necessitated a revert in order to
avoid having unmerged stuff in 3.0.

community/server/pom.xml

@@ -507,52 +507,6 @@
         </configuration>
       </plugin>
 
-      <plugin>
-        <artifactId>maven-antrun-plugin</artifactId>
-        <version>1.7</version>
-        <!--$NO-MVN-MAN-VER$-->
-        <executions>
-          <execution>
-            <id>generate-source-based-documentation</id>
-            <phase>process-classes</phase>
-            <configuration>
-              <target>
-                <java classname="org.neo4j.server.rest.transactional.error.ErrorDocumentationGenerator"
-                      classpathref="maven.compile.classpath" failonerror="true">
-                  <arg value="${project.build.directory}/docs/dev/rest-api"/>
-                </java>
-              </target>
-            </configuration>
-            <goals>
-              <goal>run</goal>
-            </goals>
-          </execution>
-        </executions>
-        <dependencies>
-          <dependency>
-            <groupId>ant-contrib</groupId>
-            <artifactId>ant-contrib</artifactId>
-            <version>1.0b3</version>
-            <exclusions>
-              <exclusion>
-                <groupId>ant</groupId>
-                <artifactId>ant</artifactId>
-              </exclusion>
-            </exclusions>
-          </dependency>
-          <dependency>
-            <groupId>org.apache.ant</groupId>
-            <artifactId>ant</artifactId>
-            <version>1.8.2</version>
-          </dependency>
-          <dependency>
-            <groupId>org.apache.ant</groupId>
-            <artifactId>ant-apache-regexp</artifactId>
-            <version>1.8.2</version>
-          </dependency>
-        </dependencies>
-      </plugin>
-
     </plugins>
 
     <pluginManagement>