Well first the only reason I can think that you might want to is because someone has told you, or you have read that it will speed up your system.
The basis behind this is that if your system runs out of memory for any given task then it will write to the HDD instead which is very much slower than the system Ram.
If you remove the page file as many tweak guides recommend you run the risk of the system crashing t a BSOD due to there being no access to memory.
On this basis I recommend you do not delete the file.
Any further questions please do not hesitate.