Remove building validationListenerAssignee

It doesn't exist.

Change-Id: I21b90066085d7067c158e88088d2e4451cb3ac96

Author: paladox

BUILD

@@ -19,7 +19,6 @@ genrule(
         "//example-sshCommandOption",
         "//example-topMenu",
         "//example-usageDataLogger",
-        "//example-validationListenerAssignee",
         "//example-validationListenerCommit",
         "//example-validationListenerHashtag",
         "//example-validationListenerMerge",

pom.xml

@@ -44,7 +44,6 @@ limitations under the License.
     <module>example-sshCommandOption</module>
     <module>example-topMenu</module>
     <module>example-usageDataLogger</module>
-    <module>example-validationListenerAssignee</module>
     <module>example-validationListenerCommit</module>
     <module>example-validationListenerHashtag</module>
     <module>example-validationListenerMerge</module>