refactor: remove unused method

docs/08_Format_API/03_FormatAbstract.md

@@ -3,7 +3,6 @@ The `FormatAbstract` class implements the [`FormatInterface`](../08_Format_API/0
 * [setContentType](#the-setcontenttype-function)
 * [callContentType](#the-callcontenttype-function)
 * [sanitizeHtml](#the-sanitizehtml-function)
-* [array_trim](#the-array_trim-function)
 
 # Functions
 
@@ -30,11 +29,3 @@ The `sanitizeHtml` function receives an HTML formatted string and returns the st
 ```PHP
 sanitizeHtml(string $html): string
 ```
-
-## The `array_trim` function
-
-The `array_trim` function receives an array of strings and returns the same array with all elements trimmed (like using the `trim` function on all elements)
-
-```PHP
-array_trim(array $elements): array
-```

lib/FormatAbstract.php

@@ -181,23 +181,4 @@ abstract class FormatAbstract implements FormatInterface {
 		// We leave alone object and embed so that videos can play in RSS readers.
 		return $html;
 	}
-
-	/**
-	 * Trim each element of an array
-	 *
-	 * This function applies `trim()` to all elements in the array, if the element
-	 * is a valid string.
-	 *
-	 * @param array $elements The array to trim
-	 * @return array The trimmed array
-	 *
-	 * @todo This is a utility function that doesn't belong here, find a new home.
-	 */
-	protected function array_trim($elements){
-		foreach($elements as $key => $value) {
-			if(is_string($value))
-				$elements[$key] = trim($value);
-		}
-		return $elements;
-	}
 }