Removed unused method

Removed extractExcerptTerm method that was not used anymore.

Author: Euak

src/Corpus/TextCorpus.php

@@ -149,23 +149,6 @@ public function concordancePositions(string $text, string $needle, int $contextL
         return $positions;
     }
 
-    /**
-    * Mark the neddle and get its context
-    *
-    * @return String
-    */
-    private function extractExcerptTerm(int $needlePos, int $needleLength, String $text, int $contextLength, bool $mark = false)
-    {
-        //marking the term
-        $text = ($mark) ? Text::markString($text, $needlePos, $needleLength, ['{{','}}']) : $text;
-        $needleLength = ($mark) ? $needleLength+4 : $needleLength;
-
-        //extracts the excerpt
-        $text = Text::getExcerpt($text, $needlePos, $needleLength, $contextLength);
-
-        return utf8_encode($text);
-    }
-
     /**
      * Get percentage of times the needle shows up in the text
      * @param string $needle