The missing line from 'Half-Blood Prince'

Two sentences spoken by Dumbledore were edited out of the UK edition, but remain in the US edition. They also are in the deluxe edition of the book. The page (in Chapter 27) from the UK edition can be seen here, and the page from the US edition, with the two additional sentences, can be seen here (spoiler warning!).

yeah!thanx a lot misha!

i read that in dumbledoreisnotdead website.

its confusing!i wonder why they did that!

Yes... Why did they remove those 2 lines? But it might be a clue for book 7... Not sure... just guessing 😳

Oooh...y were they omitted...I already had them in mine.

I don't have it in mine...

i don't know anythin coz i didn't get my book back.... 😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭   😭    😭   😭 😭   😭   😭   😭   😭    😭   😭   😭   😭   😭   😭   😭   😭   😭   😭 ......... i really really want it and i m gettin it back anyhow..

and i m tryin my level best 2 get it back.. and i hope i do get it back... u guys plz plz plz pray 4 me... plz 😭   😭