fix, refactor: removed unneccesary logic of saving Angry state to persistent storage

Signed-off-by: lisoveliy <lisoveliy@proton.me>

README.md

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+# Return Piglin Farms
+
+It's plugin for Spigot-compatible servers that makes some tweaks for mimic 1.21.4 behavior of Zombified Piglins 
+(especialy when used in farms).
+
+## Tweaks:
+
+- Zombified Piglins drop XP while not attacked by player (config value - `dropXP`, `true` by default)
+- Zombified Piglins drop gold ingots while not attacked by player
+- Zombified Piglins don't equip spears (config value - `disableSpears`, `true` by default)
+
+All loot and XP table used from [minecraft wiki](https://minecraft.wiki/w/Zombified_Piglin#Drops) for 1.21.11. It means,
+plugin will give to player exact loot from table from 1.21.11 (Default column)
+
+## Works only on 1.21.11
+I don't plan to build this plugin for other versions, but you can **build it yourself**!