Remove deprecated handler registration

`http_basic_auth_set_check_handler sub {}` was deprecated since February
2019 (release 0.06), use `http_basic_auth_handler check_login => sub {}`
instead.

Changes

@@ -2,6 +2,7 @@ Revision history for Dancer2-Plugin-Auth-HTTP-Basic-DWIW
 
 0.09    2023-10-22
         - fix for Dancer2 1.0.0: header keyword deprecated, replaced by response_header (thanks ANDK!)
+        - remove deprecated handler configuration (deprecated since 0.06, so Feb 2019)
 
 0.0801  2020-09-30
         - add repository URL to metacpan sidebar (thanks github @chorny!)

lib/Dancer2/Plugin/Auth/HTTP/Basic/DWIW.pm

@@ -80,13 +80,6 @@ register http_basic_auth_login => sub {
     is_global => 0
 };
 
-register http_basic_auth_set_check_handler => sub {
-    my ($dsl, $handler) = @_;
-
-    warn 'This is deprecated! Please use http_basic_auth_handler check_login => sub {}';
-    $dsl->http_basic_auth_handler(check_login => $handler);
-};
-
 register http_basic_auth_handler => sub {
     my ($dsl, $name, $handler) = @_;
     $HANDLERS->{$name} = $handler;

t/02-plugin.t

@@ -9,7 +9,7 @@ use HTTP::Request::Common;
     use Dancer2;
     use Dancer2::Plugin::Auth::HTTP::Basic::DWIW;
 
-    http_basic_auth_set_check_handler sub {
+    http_basic_auth_handler check_login => sub {
         my ( $user, $pass ) = @_;
 
         return $user eq 'foo' && $pass eq 'bar';

t/04-bad_stuff.t

@@ -9,7 +9,7 @@ use HTTP::Request::Common;
     use Dancer2;
     use Dancer2::Plugin::Auth::HTTP::Basic::DWIW;
 
-    http_basic_auth_set_check_handler sub {
+    http_basic_auth_handler check_login => sub {
         my ( $user, $pass ) = @_;
         die 'foo';
         return $user eq 'foo' && $pass eq 'bar';