Was this hearth base structural?

[Ges1]

I had a loose/wobbly hearth in my daughter's bedroom, and since I was going to lay a new floor, I thought I'd just break it up and then I'd be able to OSB over it and get full floor coverage, which hasn't been possible since the hearth slab has always been there.

Problem came that once I'd broken it, it had now worried me that it was holding up the chimney. Here's some pictures:

It's on the second floor of the house, and the only open fireplace in use is the wood stove directly below

 

[Wayners]

Heath is just a slab for the look and heat.
Just cover floor with wood

 

[Ges1]

Thanks dude, I thought as much. Was just a bit concerned because the very back of it appears to have been more fully mortared in, although it wasn't even remotely connected to anything. I got worried that once upon a time, maybe it was connected to something important!

Cheers, have a great evening