I was wondering about this too. So far I haven't removed Dimension LE because I thought I might lose samples. (I can't speak for Dimension Pro cuz I never had it.) It gets complicated where all these sfz, prog, wav, and flac files are located. I did a lot of analysis on this. In my case, I found files exist in or under these folders:
D:\CAKEWALK\CONTENT
C:\Program Files\Cakewalk
C:\Program Files (x86)\Cakewalk
C:\ProgramData\Cakewalk
Fortunately, a vast majority are in the rapture folders under D:\CAKEWALK\CONTENT. And that happened because I was given an option during Rapture Pro installation as to where I wanted them. Whereas, with Dimension LE and everything that came bundled with Cakewalk Pro, I don't think there was an option. So they unfortunately got put on the C drive. Anyway, I wrote an Autohotkey script that searches for where sfz and prog files are located within those 4 directories. That way if I call up a prog in Rapture Pro, I can quickly search where the heck its sfz, wav and flac files are located. Then I can look at the sfz file and see what samples are in it. I've found some of them are located in the C: directories. I'm wondering if deleting Dimension LE would take a few of the wav and flac files away from Rapture Pro. In my case, I don't think it's a large enough disk space saving to justify losing samples so I haven't done so yet.