refactor: remove asp.net versioning

PluralKit.API/Controllers/v1/MessageController.cs

@@ -7,8 +7,7 @@ using PluralKit.Core;
 namespace PluralKit.API;
 
 [ApiController]
-[ApiVersion("1.0")]
-[Route("v{version:apiVersion}/msg")]
+[Route("v1")]
 public class MessageController: ControllerBase
 {
     private readonly IDatabase _db;
@@ -20,7 +19,7 @@ public class MessageController: ControllerBase
         _db = db;
     }
 
-    [HttpGet("{mid}")]
+    [HttpGet("msg/{mid}")]
     public async Task<ActionResult<JObject>> GetMessage(ulong mid)
     {
         var msg = await _db.Execute(c => _repo.GetMessage(c, mid));