reproducible Debian: mark jtk1a and virt32a-armhf as back online.

jenkins-home/offline_nodes

@@ -23,13 +23,9 @@ odxu4b-armhf-rb.debian.net
 
 # disk failure
 odxu4a-armhf-rb.debian.net
+jtx1a-armhf-rb.debian.net
 
 # needs investigation
-# (powercycled once, didnt come back)
-jtk1a-armhf-rb.debian.net
-jtx1a-armhf-rb.debian.net
-# no idea how to powercycle :(
-virt32a-armhf-rb.debian.net
 
 # Down here nodes are automatically added by the maintenance job when they have
 # been failing their health check for too long.