* Renamed VAR_TERRAIN and introduced a var-based field terrains timer
* Fixed sky battle configs alignment and syntax
* Added B_VAR_TERRAIN_TIMER handling to Overworld_ResetBattleFlagsAndVars
* Removed pointless edits to EndTurnTerrain
* Updated B_VAR_TERRAIN_TIMER's comment
* Updated the syntax of ABILITYEFFECT_SWITCH_IN_TERRAIN to comply with Agbcc
* Nuked pointless VarGet calls in the case ABILITYEFFECT_SWITCH_IN_TERRAIN of AbilityBattleEffects
* Reverted changes made to BS_SetRemoveTerrain
I shouldn't have touched it at all since it's not involved with B_VAR_TERRAIN functionality.
* Removed trailing spaces in the case ABILITYEFFECT_SWITCH_IN_TERRAIN of AbilityBattleEffects