Change mobs blood texture to generic dmg particle

mods/mobs/api.txt

@@ -673,8 +673,6 @@ External Settings for "minetest.conf"
    'enable_damage'          if true monsters will attack players (default is true)
    'only_peaceful_mobs'     if true only animals will spawn in game (default is
                             false)
-   'mobs_disable_blood'     if false blood effects appear when mob is hit (default
-                            is false)
    'mobs_spawn_protected'   if set to false then mobs will not spawn in protected
                             areas (default is true)
    'remove_far_mobs'        if true then untamed mobs that are outside players
@@ -683,8 +681,6 @@ External Settings for "minetest.conf"
                             spawn number e.g. mobs_animal:cow = 1000,5
    'mob_difficulty'         sets difficulty level (health and hit damage
                             multiplied by this number), defaults to 1.0.
-   'mob_show_health'        if false then punching mob will not show health status
-                            (true by default)
    'mob_chance_multiplier'  multiplies chance of all mobs spawning and can be set
                             to 0.5 to have mobs spawn more or 2.0 to spawn less.
                             e.g.  1 in 7000 * 0.5 = 1 in 3500 so better odds of