Remove duplicate version specifications

Change-Id: I0fe6027e66815ab2e7db5e090dd5aea39b3c36e1
diff --git a/pom.xml b/pom.xml
index 21f4d33..6afd9e9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -103,7 +103,6 @@
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
-            <version>${project.version}</version>
             <scope>test</scope>
             <classifier>tests</classifier>
         </dependency>