I don't know what to tell you - there is no cite for that claim in the filing, and Caltech's own CDS filings say that they do consider race. Is there any statement from Caltech that says they do not consider race in admissions?
The link i have provided you is the filing and it says Caltech does not consider race.
It's a filing from a plaintiff that is not Caltech. That plaintiff ("Students For Fair Admissions, Inc") is making an assertion without a citation. Given that sentence contradicts a filing made by Caltech (their annual Common Data Set filings), I'd like to see something more direct from Caltech before I give any weight to SfFA's statement.