Use the flat end of a spudger to pry the front display bezel off the top edge of the display assembly.

It may be helpful to insert and twist the flat end of your spudger to enlarge the gap between the front & rear display bezels as you work your way around the edge of the display.

Continue separating until the top edge of the front display bezel is free from the display assembly.

Be careful when prying near the iSight camera board, as it has exposed circuitry and is delicate.