app: Cleanup structure definitions
app: Cleanup structure definitions

Remove the redundant structure declarations from the structure
definitions as we explicitly declare an instance of each structure.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@opentechlabs.co.uk>

ac000/fcgi_app_core,ac000/fcgi_app_core