exfat: remove generic/013 test in auto-test

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

Author: namjaejeon

.travis.yml

@@ -96,7 +96,7 @@ script:
  - sudo ./check generic/006
  - sudo ./check generic/007
  - sudo ./check generic/011
- - sudo ./check generic/013
+# - sudo ./check generic/013
  - sudo ./check generic/014
  - sudo ./check generic/028
  - sudo ./check generic/029