Fix PMD violation: remove redundant main method

Author: sriieeu

src/main/java/com/thealgorithms/strings/KnuthMorrisPratt.java

@@ -81,15 +81,4 @@ public static List<Integer> search(final String text, final String pattern) {
         }
         return occurrences;
     }
-
-    /**
-     * Main method demonstrating the KMP algorithm with an example.
-     *
-     * @param args command line arguments (unused)
-     */
-    public static void main(String[] args) {
-        final String text = "AAAAABAAABA";
-        final String pattern = "AAAA";
-        search(text, pattern);
-    }
 }