refactor: clean up unused imports and dead code across commands, services, and tests.

src/commands/inventory/use.ts

@@ -1,5 +1,5 @@
 import { createCommand } from "@/lib/utils";
-import { SlashCommandBuilder, EmbedBuilder, MessageFlags } from "discord.js";
+import { SlashCommandBuilder } from "discord.js";
 import { inventoryService } from "@/modules/inventory/inventory.service";
 import { userService } from "@/modules/user/user.service";
 import { createErrorEmbed, createSuccessEmbed } from "@lib/embeds";