Are these unix exe files and others 32-bit code, & should I do something about them before moving to Catalina? I am running Mojave 10.14.6  (on a late 2013 MacBook Pro), waiting to upgrade to Catalina.  Checking for 32bit applications lead to a list containing

/System/Library/Frameworks/DiscRecording.framework/Versions/A/Resources/draudiotool
/System/Library/Frameworks/AppKitScripting.framework/Versions/A/AppKitScripting
/System/Library/PrivateFrameworks/vmutils.framework/Versions/A/vmutils
/System/Library/PrivateFrameworks/CoreMediaPrivate.framework/Versions/A/CoreMediaPrivate


(which seem to be mostly Unix executable files), some dynamic libraries, a few apps, and then some items like this

/sbin/autodiskmount
/usr/sbin/pictd
/usr/lib/libnetsnmp.5.2.1.dylib
/usr/bin/qc2movie


Are these 32-bit code files that are going to block the use of apps, even if the apps are 64-bit?  Will installing Catalina remove them, or should I delete them first?  I can delete the apps (don’t need or can upgrade them), but is there anything I can do ahead of time with this list?
The content of /System as well as all files in /sbin, /usr/sbin, /usr/lib and /usr/bin is part of a macOS installation and will be replaced/upgraded if/when you upgrade to Catalina.