Update mandoc test for feh-cam(1) and gen-cam-menu(1) removal

test/mandoc.t

@@ -3,7 +3,7 @@ use strict;
 use warnings;
 use 5.010;
 
-use Test::More tests => 3;
+use Test::More tests => 1;
 
 SKIP: {
 	my $mandoc_present = 0;