NV fixes (#4240)

# About the pull request

Removal of deep ocean around the monsoon that was causing players to get
stuck as well as removal of previously hidden incend ammo not caught.

Tested, small map changes only.

# Explain why it's good for the game

As requested.

# Testing Photographs and Procedure

# Changelog

:cl:
maptweak: Fixed deep ocean around NV monsoon, removed incend ammo.
/:cl: