Clean up unused imports

PluralKit.Bot/Services/EmbedService.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Globalization;
 using System.Linq;
 using System.Threading.Tasks;
 using Discord;

PluralKit.Bot/Services/LogChannelService.cs

@@ -1,4 +1,3 @@
-using System.Data;
 using System.Threading.Tasks;
 using Dapper;
 using Discord;

PluralKit.Bot/Services/ProxyService.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Data;
 using System.Linq;
-using System.Net;
 using System.Net.Http;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;

PluralKit.Bot/Services/WebhookCacheService.cs

@@ -3,7 +3,6 @@ using System.Collections.Concurrent;
 using System.Linq;
 using System.Threading.Tasks;
 using Discord;
-using Discord.WebSocket;
 
 namespace PluralKit.Bot
 {