Adjust number of tests for pg_dump 001_basic.pl

When removing a test, need to make sure the count of tests is adjusted
when it isn't calculated.

src/bin/pg_dump/t/001_basic.pl

@@ -4,7 +4,7 @@ use warnings;
 use Config;
 use PostgresNode;
 use TestLib;
-use Test::More tests => 70;
+use Test::More tests => 68;
 
 my $tempdir       = TestLib::tempdir;
 my $tempdir_short = TestLib::tempdir_short;