[AMEENAMEEN]

I want to remove this certain area , not all the shops , how can i do that?.

[tyler12]

that building is one object

[thimo]

Like tyler said... Its one object so its impossible

[AMEENAMEEN]

i saw someone do that

[Jack_Wilson]

No, you mustn't have because they're one object meaning all it's contents are compressed to one thing.
They probably covered the entrance with some sort of object.