How to extract a seized front wheel spindle
Assuming the spindle is seized to the bearings or the spacer between the bearings, remove the tyre, tube and rim tape then soak the wheel overnight in diesel or paraffin.
If you have a stout leakproof plastic bag you don't have to use a huge amount of diesel (or paraffin).
The next day leave it to dry out (store the diesel/paraffin somewhere safe and well-labelled - you may need it again).
Once the wheel is reasonably dry try hammering the spindle out. Nothing too severe and have a block of hardwood (not softwood) across the end of the spindle to protect it.
If this doesn't work, the spindle may have to be pressed out.