fix(guide): simplify directory structure

guide/english/javascript/tutorials/generate-random-whole-numbers-with-javascript/index.md

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+---
+title: Generate Random Whole Numbers with JavaScript
+---
+It's great that we can create random decimal numbers, but it's even more useful if we lot more useful to generate a random whole number.
+
+To achieve this we can multiply the random number by ten and use the `Math.floor()` to convert the decimal number to a whole number
+
+    Math.floor(Math.random()*10)