POM: Bump parent to pom-scijava-39.0.0

remove obsolete version overrides

pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>38.0.1</version>
+		<version>39.0.0</version>
 		<relativePath />
 	</parent>
 
@@ -143,10 +143,6 @@
 		<license.licenseName>bsd_2</license.licenseName>
 		<license.copyrightOwners>BigDataViewer developers.</license.copyrightOwners>
 
-		<imglib2.version>7.1.2</imglib2.version>
-		<imglib2-realtransform.version>4.0.3</imglib2-realtransform.version>
-		<imglib2-cache.version>1.0.0-beta-19</imglib2-cache.version>
-		<imglib2-algorithm.version>0.16.0</imglib2-algorithm.version>
 		<spim_data.version>2.3.5</spim_data.version>
 
 		<!-- NB: Deploy releases to the SciJava Maven repository. -->