Remove missing plugins from local josm

[Maarten Deen]

When I start JOSM I get a few warnings about missing plugins:
2020-07-04 10:04:03.485 WARNING: Missing plugin main version in plugin 
annotation-tester
2020-07-04 10:04:03.496 WARNING: Missing plugin main version in plugin 
nearclick
2020-07-04 10:04:03.499 WARNING: Missing plugin main version in plugin 
osmarender
2020-07-04 10:04:03.500 WARNING: Missing plugin main version in plugin 
plastic_laf

When I go to the plugins in the configuraton, only annotation-tester 
shows up, but it is unchecked and it says "annotation-tester: Version 
unknown (local: unknown)". The other three are not even in the list (I 
did download the list and I am viewing all plugins).
How can I clean this up so the messages disappear?

Regards,
Maarten