Clone::clone is no longer used, so dependency has been removed

modules/Bio/EnsEMBL/Hive/Queen.pm

@@ -61,8 +61,8 @@ package Bio::EnsEMBL::Hive::Queen;
 
 use strict;
 use POSIX;
-use Clone 'clone';
 use File::Path 'make_path';
+
 use Bio::EnsEMBL::Utils::Argument;
 use Bio::EnsEMBL::Utils::Exception;
 

modules/Bio/EnsEMBL/Hive/Scheduler.pm

@@ -23,8 +23,6 @@ package Bio::EnsEMBL::Hive::Scheduler;
 use strict;
 use warnings;
 
-use Clone 'clone';
-
 use Bio::EnsEMBL::Hive::Analysis;
 use Bio::EnsEMBL::Hive::AnalysisStats;
 use Bio::EnsEMBL::Hive::Queen;