Conversation so far:
What was the Guinness World Records for Mohammed Rafi?
Rafi had challenged the claim that Lata Mangeshkar has recorded the highest number of songs (not less than 25,000 according to Guinness).
How many songs did Mohammed Rafi sing?
They estimated the number of songs sung by Rafi to be anything from 25,000 to 26,000.
What did Mohammed Rafi write in the letter to Guinness World Records?
This prompted Rafi to write a letter, in protest, to Guinness.
What year did Mohammed Rafi write the letter to Guinness World Records?
1979
Was Mohammed Rafi ever awarded for those 25,000 to 26,000 recordings with Guinness World Records?
in its 1984 edition, the Guinness Book of World Records gave Mangeshkar's name for the Most Recordings and stated, Rafi claimed to have recorded 28,000 songs between 1944 and 1980.“
What was other things stated and recorded in the Guinness World Records book on the highest number of songs with Mohammed Rafi and Lata Mangeshkar?
The Guinness Book entries for both Rafi and Lata were eventually deleted in 1991.

Question: Do it state why the entries was deleted?
Self-contained rewrite: Do Guinness World Records state why the entries was deleted?