Third party packages paths should not be set in nuxeoctl.bat

1. The current instructions for installing 3^rd^ party apps consistency call out adding their installation directories to path in https://doc.nuxeo.com/nxdoc/installing-and-setting-up-related-software/
2. The \3rdparty\ path referenced in nuxeoctl.bat doesn’t exist in the distro.  It is from prior releases.
3. This bug likely has no real impact on running the server since the paths don’t exist and therefore no commands would be resolved anyway.

REM ***** Add third-party packages from the installer to the path *****

set PATH=%NUXEO_HOME%\3rdparty\java\bin;%NUXEO_HOME%\3rdparty\ffmpeg\bin;%NUXEO_HOME%\3rdparty\ImageMagick;%PATH%;%NUXEO_HOME%\3rdparty\pdftohtml;%NUXEO_HOME%\3rdparty\gs\bin;%NUXEO_HOME%\3rdparty\misc\bin