In FSX, there are many views one can choose from and cycle through by pressing S (next category) and A (next view in category) on the keyboard, including Cockpit (2D), Virtual Cockpit (3D), Locked Spot, FlyBy, Top-Down, etc. Often there are views that we seldom or never use, however.
Steps below will get rid some of them for good.
Option 1:
1) Locate Cameras.cfg (x:\Users\<user>\AppData\Roaming\Microsoft\FSX) and make a backup of it
2) Open the file and you will find 11 Camera Definition sectons inside
3) Just delete the Camera Definition section(s) you don’t need
4) Save and Exit