after-merge fixes: test cases that were moved to extra/binlog_tests do not need to check for binlog being enabled


mysql-test/extra/binlog_tests/blackhole.test:
  after-merge fix, not needed in 5.1
mysql-test/extra/binlog_tests/ctype_cp932_binlog.test:
  after-merge fix, not needed in 5.1
mysql-test/extra/binlog_tests/ctype_ucs_binlog.test:
  after-merge fix, not needed in 5.1
mysql-test/extra/binlog_tests/drop_temp_table.test:
  after-merge fix, not needed in 5.1
mysql-test/extra/binlog_tests/insert_select-binlog.test:
  after-merge fix, not needed in 5.1
mysql-test/extra/binlog_tests/mix_innodb_myisam_binlog.test:
  after-merge fix, not needed in 5.1