Extract Database to interface

PluralKit.Core/Database/Database.cs

@@ -14,7 +14,7 @@ using Serilog;
 
 namespace PluralKit.Core
 {
-    public class Database
+    internal class Database: IDatabase
     {
         private readonly CoreConfig _config;
         private readonly ILogger _logger;
@@ -64,18 +64,6 @@ namespace PluralKit.Core
             await conn.OpenAsync();
             return conn;
         }
-        
-        public async Task Execute(Func<IPKConnection, Task> func)
-        {
-            await using var conn = await Obtain();
-            await func(conn);
-        }
-        
-        public async Task<T> Execute<T>(Func<IPKConnection, Task<T>> func)
-        {
-            await using var conn = await Obtain();
-            return await func(conn);
-        }
 
         private class PassthroughTypeHandler<T>: SqlMapper.TypeHandler<T>
         {