Leave the suspect folder and the exclusions for it, that would save having to recreate it if needed in the future.
There is no rush to delete anything from the chest, a protected area where it can do no harm. Anything that you send to the chest you should leave there for a few weeks. If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
The same is true if you have old file copies in the suspect folder, once you have confirmed one way or another (why reason they were put in there) they too can be actioned:
1. If the file was confirmed infected then it can be removed from the suspect folder and follow the procedure above for removal from the chest.
2. If a file was confirmed an FP, you would be restoring it from the chest, confirm that the file is in the original location and remove the copy from the chest and suspect folder.