You are reviewing your SPE and note the following files contain certificates that have either expired, or are about to expire.
SPE 9.1 and older
The ca-bundle.pem files do not have any impact on the SPE.
The ca-bundle.pem files were introduced in the Stargate directory as a reference for cert stores, but were not used for long. As a result they were removed in subsequent versions of the SPE (9.2 and newer). The ca-bundle.pem files are placed inside the fallback directories which are not referenced as the SPE's current definitions are stored in the <SPE_INSTALL_FOLDER>/