UNOMI-915: remove useless usage on maven-source.plugin.version (#739)

Author: jsinovassin

pom.xml

@@ -135,7 +135,6 @@
         <maven-javadoc.plugin.version>3.11.2</maven-javadoc.plugin.version>
         <maven-surefire.plugin.version>3.5.3</maven-surefire.plugin.version>
         <maven-failsafe.plugin.version>3.5.2</maven-failsafe.plugin.version>
-        <maven-source.plugin.version>3.3.1</maven-source.plugin.version>
         <maven-assembly.plugin.version>3.7.1</maven-assembly.plugin.version>
         <maven-dependency.plugin.version>3.8.1</maven-dependency.plugin.version>
         <maven-scm-publish.plugin.version>3.2.1</maven-scm-publish.plugin.version>
@@ -839,19 +838,6 @@
                     <artifactId>maven-failsafe-plugin</artifactId>
                     <version>${maven-failsafe.plugin.version}</version>
                 </plugin>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-source-plugin</artifactId>
-                    <version>${maven-source.plugin.version}</version>
-                    <executions>
-                        <execution>
-                            <id>attach-sources</id>
-                            <goals>
-                                <goal>jar</goal>
-                            </goals>
-                        </execution>
-                    </executions>
-                </plugin>
                 <plugin>
                     <artifactId>maven-assembly-plugin</artifactId>
                     <version>${maven-assembly.plugin.version}</version>