Tycho version is already defined in parent, do not uselessly override

Author: akurtakov

ua/org.eclipse.ua.tests.doc/pom.xml

@@ -32,7 +32,6 @@
       <plugin>
         <groupId>org.eclipse.tycho</groupId>
         <artifactId>tycho-surefire-plugin</artifactId>
-        <version>${tycho.version}</version>
         <configuration>
           <useUIHarness>true</useUIHarness>
           <useUIThread>true</useUIThread>