Derive ship scrap drop from threat

bin/app/data/config/ships.toml

@@ -39,9 +39,6 @@ max_rotation_speed_radps_formula = "6.28"
 [ship.sensor]
 sensor_range_m_formula = "150"
 
-[ship.loot]
-scrap_drop = 2
-
 
 # Frigate — 5 cells in a plus shape. Holds a couple of small guns plus at
 # most one 1x2 support (every 1x2 placement crosses the center cell), or one
@@ -73,9 +70,6 @@ max_rotation_speed_radps_formula = "4"
 [ship.sensor]
 sensor_range_m_formula = "200"
 
-[ship.loot]
-scrap_drop = 5
-
 
 # Destroyer — 8 cells: a long gun deck with three turret bumps on top.
 # Still no 2x2 area, so it packs more small guns than a frigate but can never
@@ -106,9 +100,6 @@ max_rotation_speed_radps_formula = "3"
 [ship.sensor]
 sensor_range_m_formula = "220"
 
-[ship.loot]
-scrap_drop = 8
-
 
 # Cruiser — 12 cells with notched corners. Fits at most two 2x2 m guns
 # (stacked through the middle), leaving the four side cells for small
@@ -141,9 +132,6 @@ max_rotation_speed_radps_formula = "2"
 [ship.sensor]
 sensor_range_m_formula = "250"
 
-[ship.loot]
-scrap_drop = 15
-
 
 # Battlecruiser — 16 cells: a wide bow split into two gun cheeks, tapering
 # toward the stern. Fits three 2x2 m guns (two in the cheeks, one through
@@ -177,9 +165,6 @@ max_rotation_speed_radps_formula = "1.5"
 [ship.sensor]
 sensor_range_m_formula = "260"
 
-[ship.loot]
-scrap_drop = 20
-
 
 # Battleship — 24 cells: a broadside hull with notched flanks on every other
 # row. Fits four 2x2 m guns (two per gun deck) with the bow, stern, and flank
@@ -216,9 +201,6 @@ max_rotation_speed_radps_formula = "1"
 [ship.sensor]
 sensor_range_m_formula = "280"
 
-[ship.loot]
-scrap_drop = 35
-
 
 # Dreadnought — 36 cells: the main battery deck is split into three 3x3 gun
 # slots by structural spacer columns, so exactly three l guns fit side by
@@ -254,9 +236,6 @@ max_rotation_speed_radps_formula = "0.5"
 [ship.sensor]
 sensor_range_m_formula = "300"
 
-[ship.loot]
-scrap_drop = 60
-
 
 # Carrier — 37 cells: the top flight deck (rows 0-1) is the only place wide
 # enough for the 2x6 drone hangar, and exactly one fits. The middle deck row
@@ -290,6 +269,3 @@ max_rotation_speed_radps_formula = "0.5"
 
 [ship.sensor]
 sensor_range_m_formula = "350"
-
-[ship.loot]
-scrap_drop = 60