Unit Tests

- Removed useless setup/teardown tests, improving the signal to noise ratio.

test/history.monthly.t

@@ -27,7 +27,7 @@
 
 use strict;
 use warnings;
-use Test::More tests => 6;
+use Test::More tests => 4;
 
 # Ensure environment has no influence.
 delete $ENV{'TASKDATA'};
@@ -38,7 +38,6 @@ if (open my $fh, '>', 'time.rc')
 {
   print $fh "data.location=.\n";
   close $fh;
-  ok (-r 'time.rc', 'Created time.rc');
 }
 
 # Create some tasks that were started/finished in different months, then verify
@@ -72,10 +71,4 @@ like ($output, qr/4\s+2\s+1\s+1/, 'history.monthly - average');
 
 # Cleanup.
 unlink qw(pending.data completed.data undo.data backlog.data time.rc);
-ok (! -r 'pending.data'   &&
-    ! -r 'completed.data' &&
-    ! -r 'undo.data'      &&
-    ! -r 'backlog.data'   &&
-    ! -r 'time.rc', 'Cleanup');
-
 exit 0;