As usual Zen is lying. There was never any language in the amendment put to California voters about conditionality, so there was nothing to take out. Newsom said he would give Trump/Texas until August 11 to stop their own gerrymander, or else California would go forward. On August 13, Newsom wrote the following:
""DONALD 'TACO' TRUMP, AS MANY CALL HIM, 'MISSED' THE DEADLINE!!! CALIFORNIA WILL NOW DRAW NEW, MORE 'BEAUTIFUL MAPS,' THEY WILL BE HISTORIC AS THEY WILL END THE TRUMP PRESIDENCY (DEMS TAKE BACK THE HOUSE!),"
So as of August 13, there was no conditionality about the California effort.
There never could have been. Proposition 50 was an amendment to the state constitution. Imagine writing into a constitution, "the state shall use these maps for elections, unless Texas does something in which case we will use these other maps." States don't pass laws that are conditional on what other states do. They especially don't write laws conditional on the outcome of judicial proceedings involving other states' laws.