Looking at the diagram, it would have done no good to disassemble the bolt, since the extractor and spring are in their own place in the front of the bolt and there is no contact with the rest of the bolt.
Soaking in a solvent will probably correct the problem but you can remove the extractor by pushing the plunger back with a small screwdriver and tipping the extractor out. If you do, make sure the spring and plunger don't fly off into the corner.
Jim