Alphabet is Google's parent company and did not exist when "Don't be evil" was put at the top of Googles preamble.

Functionally, they took it out. Both by not using it in the new parent company, and deleting it out of the preamble of Google itself.

Yeah okay it still occurs somewhere. But "Do the right thing" as substitute to "Don't be evil" has clear implications except if you are terribly naive.