fix(guide): simplify directory structure

guide/english/javascript/window-clearinterval-method/index.md

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+---
+title: Window clearInterval Method
+---
+## Window clearInterval Method
+
+The 'clearInterval()' method is used to clear a timer set with the 'setInterval()' method.
+
+```js
+    clearInterval(setInteval_ID); 
+```
+
+To be able to use the 'clearInterval()' method, you must use a global variable.
+```js
+    myID = setInterval(function, milliseconds); 
+```
+
+#### More Information:
+<!-- Please add any articles you think might be helpful to read before writing the article -->
+
+Documentation: <a href='https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearInterval' target='_blank' rel='nofollow'>MDN</a> 
+
+Some more examples on <a href='https://www.w3schools.com/jsref/met_win_clearinterval.asp' target='_blank' rel='nofollow'>w3schools</a>