To remove hid_generic on demand:

sudo modprobe -r hid_generic

^{(or sudo rmmod hid_generic, under the hood it's the same tool).}

To insert the module into the kernel again:

sudo modprobe hid_generic

To remove hid_generic on demand:

sudo modprobe -r hid_generic

^{(or sudo rmmod hid_generic, under the hood it's the same tool).}

To insert the module into the kernel again:

sudo modprobe hid_generic

Note the module may be re-loaded automatically when you connect a suitable device. To prevent this from happening, put

blacklist hid_generic

into /etc/modprobe.d/blacklist.conf. You will still be able to insert the module manually.