docs: fixed misleading comment about the array method (forEach instead of reduce) used in AverageMean.js (TheAlgorithms#1727)

* docs: fixed misleading comment about the array method (forEach instead of reduce) used in AverageMean.js

* fix: optimized AverageMean.js by removing redundant comments and unnecessary operations.

* Update Maths/AverageMean.js

Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>

---------

Co-authored-by: Hridyanshu7 <himank7794@gmail.com>
Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>

Author: HRIDYANSHU054

Maths/AverageMean.js

@@ -13,11 +13,7 @@ const mean = (nums) => {
     throw new TypeError('Invalid Input')
   }
 
-  // This loop sums all values in the 'nums' array using forEach loop
-  const sum = nums.reduce((sum, cur) => sum + cur, 0)
-
-  // Divide sum by the length of the 'nums' array.
-  return sum / nums.length
+  return nums.reduce((sum, cur) => sum + cur, 0) / nums.length
 }
 
 export { mean }