POM: Remove redundant version tags
POM: Remove redundant version tags

For artifacts managed by pom-scijava, we don't need to specify a version tag. It's enough to set to set the version properties to override the version if necessary.

Also remove duplicate (optional) dependency imagej-ui-swing, as it is listed as dependency already.

scenerygraphics/SciView,scenerygraphics/SciView