Remove Dancer2::Template::Simple from tests

Author: cromedome

t/error.t

@@ -214,7 +214,7 @@ subtest 'Errors with show_stacktrace and circular references' => sub {
         set something_with_config => {something => config};
         set password              => '===VERY-UNIQUE-STRING===';
         set innocent_thing        => '===VERY-INNOCENT-STRING===';
-        set template              => 'simple';
+        set template              => 'tiny';
 
         # Trigger an error that makes Dancer2::Core::Error::_censor enter an
         # infinite loop

t/issues/gh-1013/gh-1013.t

@@ -15,7 +15,7 @@ use HTTP::Request::Common;
         1;
     };
 
-    set template => 'simple';
+    set template => 'tiny';
 
     get '/' => sub {
         template t => { hi => 'hello' },

t/log_levels.t

@@ -38,7 +38,7 @@ use HTTP::Request::Common;
         # Also ensure that the current log level, not the log level when the serialiser is created, is what counts.
         set log        => 'debug';
         set serializer => 'JSON';
-        set template   => 'Simple';
+        set template   => 'Tiny';
         set session    => 'Simple';
         set log        => 'warning';