How to remove colors (make b / w) in the logo?

Question

Design

How is this done from this: (I'm not talking about the background, but about the image itself, the colors have been removed.)?
In my case, you need to remove the colors from this image:

Answer 1

https://www.google.com/search?q=to+grayscale+online
PS You should at least bother to mark as solutions those answers that you were given in other questions (some of them, in my opinion, are worthy of this).