Avoid double "up to" when rendered

[elharo]

@hboutemy see https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-dist-tool/job/master/site/dist-tool-prerequisites.html which currently says "up to up to 1.4 requires Maven 2.0.6 + JDK 4"

[hboutemy]

honestly, https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-dist-tool/job/master/site/dist-tool-prerequisites.html is a Maven-dev-internal report without real expectations from end users

the important question is: is it better for maven-shade-plugin end-users experience to update in order to make https://maven.apache.org/plugins/maven-shade-plugin/plugin-info.html easier to understand?

BTW at dist-tool level, this PR on maven-shade-plugin will lead to "up to from 1.0 to 1.4" instead of "up to up to 1.4" in the dist tool report, because dist-tool just fetches plugin-info.html from plugins
hacking the dist tool happens on https://github.com/apache/maven-dist-tool, and yes, we should probably update the code to better handle changes in the way we see this requirements history rendering: https://issues.apache.org/jira/browse/MPLUGIN-510

[hboutemy]

on the dist-tool aspect, solved by removing the field in apache/maven-dist-tool@160b1fb

report https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-dist-tool/job/master/site/dist-tool-prerequisites.html now only says "up to requires Maven 2.2.1 + JDK 5" which is sufficient: no real need for the earliest plugin versions that had these requirements