REFERENCES AVAILABLE UPON REQUEST
In my years of experience as a US-based hiring manager, I always expect people to have references available when I ask for them.
I don’t need to see the references themselves on the resume. I don’t need to see a phrase “References available upon request” on the resume.
It’s perfectly safe to leave them off. I would never assume that anyone has no references.
Another reason for leaving them off of your resume is that you want to be in control of presenting your references. When asked to provide them, determine how many are necessary, and choose which references will best represent you for this particular position. Contact your references so they will expect a call or email from this company, and discuss the job with them so that they can represent you in the best possible light.
Then give the list of references to the requester.
In your locale, the norms may differ.