Why were "Hero Allied" quotes removed?

I remember way back in 2015, commanders had specific voice lines in which they would react based on the hero you were allied with. My memory is foggy, but some rough examples:

Swann allied with Zagara.

“Ugh okay, but just don’t get creep on my tech”

Raynor with Swann

He mentions something about being good buddies.

It was a long time ago so I barely remember the others, but I know they existed at one point.

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Don’t think there would be any official reason. But I imagine it would be simply because of the cost and logistics of pulling other voice actors back in to get new voice lines each time there was a new CO made.