Remove unversioned API endpoints

PluralKit.API/Controllers/v1/AccountController.cs

@@ -10,7 +10,6 @@ namespace PluralKit.API
 {
     [ApiController]
     [ApiVersion("1.0")]
-    [Route("a")]
     [Route( "v{version:apiVersion}/a" )]
     public class AccountController: ControllerBase
     {

PluralKit.API/Controllers/v1/MemberController.cs

@@ -13,7 +13,6 @@ namespace PluralKit.API
 {
     [ApiController]
     [ApiVersion("1.0")]
-    [Route("m")]
     [Route( "v{version:apiVersion}/m" )]
     public class MemberController: ControllerBase
     {

PluralKit.API/Controllers/v1/MessageController.cs

@@ -25,7 +25,6 @@ namespace PluralKit.API
     
     [ApiController]
     [ApiVersion("1.0")]
-    [Route("msg")]
     [Route( "v{version:apiVersion}/msg" )]
     public class MessageController: ControllerBase
     {

PluralKit.API/Controllers/v1/SystemController.cs

@@ -36,7 +36,6 @@ namespace PluralKit.API
 
     [ApiController]
     [ApiVersion("1.0")]
-    [Route("s")]
     [Route( "v{version:apiVersion}/s" )]
     public class SystemController : ControllerBase
     {

PluralKit.API/Startup.cs

@@ -54,16 +54,11 @@ namespace PluralKit.API
                 .SetCompatibilityVersion(CompatibilityVersion.Latest)
                 .AddNewtonsoftJson(); // sorry MS, this just does *more*
 
-            services.AddApiVersioning(c =>
+            services.AddApiVersioning();
-            {
-                c.AssumeDefaultVersionWhenUnspecified = true;
-                c.DefaultApiVersion = ApiVersion.Parse("1.0");
-            });
             
             services.AddVersionedApiExplorer(c =>
             {
                 c.GroupNameFormat = "'v'VV";
-                c.DefaultApiVersion = ApiVersion.Parse("1.0");
                 c.ApiVersionParameterSource = new UrlSegmentApiVersionReader();
                 c.SubstituteApiVersionInUrl = true;
             });