Why was the indexed for loop removed in Kotlin?

In Kotlin you can use this syntax:

for (a in 1..10) print("$a ")              // >>> 1 2 3 4 5 6 7 8 9 10

for (a in 10 downTo 1 step 2) print("$a ") // >>> 10 8 6 4 2 

As for “why was the indexed loop removed” – scroll down for @yole’s answer.

For more info: Ranges & Loops