cargo_wrapper.py: remove duplicated lines
The same thing is done on lines 170-171: https://gitlab.gnome.org/GNOME/librsvg/-/blob/fc703c23cb998a1b0f1850fce27f07a80832f737/meson/cargo_wrapper.py#L170-171
The same thing is done on lines 170-171: https://gitlab.gnome.org/GNOME/librsvg/-/blob/fc703c23cb998a1b0f1850fce27f07a80832f737/meson/cargo_wrapper.py#L170-171