remove deprecation from math.round (#15224)

changelog.md

@@ -164,7 +164,14 @@
   echo foo
   ```
 
+- Proc `math.round` is no longer deprecated. The advice to use `strformat` instead
+  cannot be applied to every use case. The limitations and the (lack of) reliability
+  of `round` are well documented.
+
+
+
 ## Language changes
+
 - The `=destroy` hook no longer has to reset its target, as the compiler now automatically inserts
   `wasMoved` calls where needed.
 - In the newruntime it is now allowed to assign to the discriminator field

lib/pure/math.nim

@@ -768,8 +768,7 @@ else: # JS
     ##  ( 6.5 mod -2.5) ==  1.5
     ##  (-6.5 mod -2.5) == -1.5
 
-proc round*[T: float32|float64](x: T, places: int): T {.
-    deprecated: "use strformat module instead".} =
+proc round*[T: float32|float64](x: T, places: int): T =
   ## Decimal rounding on a binary floating point number.
   ##
   ## This function is NOT reliable. Floating point numbers cannot hold