Will deleting my iCloud backup remove my Photos?

No as long as you’re only deleting your backup file and not your iCloud. Your photos live separately from the backup file.

No.

(256321)

Cynga03 Said:

"iCloud, pics, and backups: If I have pics in my iCloud that are not on my phone, and I want to delete my backup (delete, redo backup for space), will it delete the pics in my iCloud with the backup?"

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iCloud and iPhone Storage:

Learn More About the Differences: What's the Difference Between Device Storage and iCloud Storage? - Apple Support