No, so far as I know it was the Congress meeting as a whole that deleted those phrases. Later, Jefferson blamed Georgia and South Carolina for deleting his words, though he also couldn't resist blaming the Northerners as well.
"The clause...reprobating the enslaving the inhabitants of Africa, was struck out in compliance to South Carolina and Georgia, who had never attempted to restrain the importation of slaves, and who on the contrary still wished to continue it. Our Northern brethren also I believe felt a little tender under these censures; for tho' their people have very few slaves themselves, yet they had been pretty considerable carriers of them to others.”
Later, Adams said he wished the passage had been kept in.
This is a better support for the claim than I had seen so far. Of course this may only be Jefferson's impression of what happened, and it may very well have been that Georgia and South Carolina were simply the first to speak out against it.
I find it hard to believe that states for whom slavery was profitable would not also speak out against it if it were necessary, so the singling out of Georgia and South Carolina is probably not an accurate assessment of the situation. Probably most of them were against it, but didn't say anything because the representatives of Georgia and South Carolina had already made the objection.
I also find it hard to believe that Adams and the others wouldn't have recognized that this language would likely provoke an objection from the states in which slavery was more significant. They were smart men.
Of course at this time, slavery was waning because it really wasn't all that profitable before the invention of the cotton gin, so maybe there wasn't all that much support for it at that time.