Ignition switch removal process is not too difficult but there are a few tricks.
as an anti-theft technique the OEM mounting bolts had hex heads that were designed to snap off at the desired torque
what is left behind is a slightly domed head as shown on the left in this photo.
You will first need to remove the plastic cover from the column. There are two Phillips head screws, one on each side, that hold the two halves together. Remove both. Place in a safe location because they are rather specific for their tasks
remove the right hand cover and it will expose the two Phillips screws that attach the signal stalk to the column. Take a photo at this point so you can replace the signal stalk in the correct location.
To remove the left hand cover you will most likely need to loosen the signal stalk.
if you cannot get the covers off you will likely have to get underneath the dash and loosen the four bolts that hold the column to the steel dash substructure. if you remove all of them the column will drop, a piece of safety wire is the easiest trick to keep it from falling onto the floor.
after all that you should be able to find the two factory shear bolts. once again, take a photo and/or use a felt tip marker so you can correctly re-install the ignition assembly. I think the easiest approach is to break out a Dremel tool with a fiberglass cut-off wheel and cut slots suitable for a flat blade screwdriver, as shown on the right hand side of the photo
You can use the slotted bolts for reassembly, or buy metric socket head cap screws. A regular hex head bolt will not fit in the bolt-head depression
BUT FIRST..!!!
Before going to all that trouble, please share your reason for removing the ignition assembly. If there is an ignition problem, it may not be necessary to remove the assembly
are you trying to resolve a problem with the ignition assembly or are you just removing it in the process of doing something else?
please give us some details and we can point you in the right direction
Larry