Hi,
The fork looks bent but not to the degree that it would keep the stem from being removed. I think it is more likely that the stem is frozen in place from years of corrosion.
I have had to fight frozen stems several times (the last one took me several hours of work spread over about 4 year?s time).
Loosen the binder bolt, and back it out of the stem about a quarter of an inch, hit it with a hard plastic mallet to loosen the binder plug if necessary.
Once you get the binder bolt and plug loose, loosen the headset locknut. The next step is to spray liberal amounts of your favorite penetrating oil onto the stem where it meets the steerer tube and allow it time to do its work.
Next try to rotate the stem by straddling the front wheel and turning the bars from side to side.
If this doesn?t work, you can remove the front wheel and clamp the fork crown or the uppermost reaches of the blades in a vise. If the bars don?t provide enough leverage you can clamp a longer piece of heavy steel rod in the stem.
Apply more rotational force and the stem will probably break free at which point you can twist it back and forth while working it slowly up and out of the steerer tube,
Use caution during each step and work slowly so you can see if the force you are using is deforming anything that you can?t or don?t want to replace. Cushion the fork with wood when clamping it in the vice holding it solidly with the least amount of force necessary.
This process has worked for me on several bikes and only once have I had to resort to the vice to free the stem.
Phil