I'm looking at a definition of the Fisher Information matrix through an integral where you integrate w.r.t. x. I'd like to apply it to the logistic regression model where the response variable $y \in \{0,1\}$. Do I need to integrate w.r.t. x and y or can I just w.l.o.g. assume $y_i = 1$ and only integrate w.r.t. x?