Remove maven profile jgit.java8

This profile isn't needed any longer since we require Java 8 as minimum
version.

Change-Id: I8a37eaf874473ff4004b9c074a810dddebde54c8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

pom.xml

@@ -724,34 +724,6 @@
   </distributionManagement>
 
   <profiles>
-    <profile>
-      <id>jgit.java8</id>
-      <activation>
-        <jdk>[1.8,)</jdk>
-      </activation>
-      <build>
-        <plugins>
-          <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-javadoc-plugin</artifactId>
-            <configuration>
-              <additionalparam>-Xdoclint:-missing</additionalparam>
-            </configuration>
-          </plugin>
-        </plugins>
-      </build>
-      <reporting>
-        <plugins>
-          <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-javadoc-plugin</artifactId>
-            <configuration>
-              <additionalparam>-Xdoclint:-missing</additionalparam>
-            </configuration>
-          </plugin>
-        </plugins>
-      </reporting>
-    </profile>
     <profile>
       <id>static-checks</id>
       <build>