If you want, go to Shimano:
and do a product search for this pedal:
Select the pedal from the list and click the download for the parts list. Notice the pedal cage and bolts at part no 7.
The pedal has a cage around it that according to the Shimano documentation, can be removed. Look at the two long bolts, about 10cm in length, which enter the cage bolts pass through or connect onto.
The bolts look like they are utterly useless as you can take them out and nothing falls apart. Shimano would not put them in there just for looks, and if they don't serve a purpose, then why have them there at all.