Remove unnecessary slob checks in lab7

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Solutions to lab7 (still buggy)

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Remove unnecessary slob checks in lab8

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Ignore fs image directory

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Solutions to lab8 (still buggy)

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>