fix update-site

Author: dietzc

org.knime.scijava.update/feature.xml

@@ -66,50 +66,17 @@
          version="0.0.0"
          unpack="false"/>
 
-   <plugin
-         id="scripting-java"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
    <plugin
          id="miglayout"
          download-size="0"
          install-size="0"
          version="0.0.0"
          unpack="false"/>
 
-   <plugin
-         id="miglayout-swing"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
    <plugin
          id="jython-shaded"
          download-size="0"
          install-size="0"
          version="0.0.0"/>
 
-   <plugin
-         id="scripting-jython"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"/>
-
-   <plugin
-         id="scripting-javascript"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"/>
-
-   <plugin
-         id="imagej-deprecated"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
 </feature>