This hadith has been transmitted by another chain of transmitters in which there is no mention of" throwing away".
Sahih Muslim Book 2, Hadith 115
← Previous Hadith When a dog licks a utensil belonging to any one of you, (the thing contained in it) should be thrown away and then (the utensil) should be washed seven times.

Sahih Muslim Book 2, Hadith 114 Next Hadith → The Messenger of Allah (ﷺ) said: When a dog drinks out of a vessel belonging to any one of you, he must wash it seven times.

Sahih Muslim Book 2, Hadith 116