Remove obsolete timestamps

Author: ctrueden

timestamps.txt

@@ -3,13 +3,11 @@ com.miglayout:miglayout-core 20250101000000
 com.miglayout:miglayout-swing 20250101000000
 com.miglayout:miglayout-swt 20250101000000
 hsqldb:hsqldb 20190101000000
-net.imagej:imagej-usage 20190624120000
 ome:bio-formats_plugins 20250101000000
 ome:formats-api 20250101000000
 ome:formats-bsd 20250101000000
 ome:formats-gpl 20250101000000
 ome:jxrlib-all 20250101000000
-org.apache.poi:poi 20250101000000
 org.apache.spark:spark-core_2.11 20250101000000
 org.jmockit:jmockit 20200701000000
 org.mockito:mockito-core 20250101000000