remove unused code

Author: vertical-blank

src/main/java/com/github/vertical_blank/sqlformatter/core/Params.java

@@ -47,22 +47,6 @@ private interface Holder {
     Object get();
 
     Object getByName(String key);
-
-    /**
-     * @param params query param
-     * @return Holder
-     */
-    static Holder of(Map<String, ?> params) {
-      return new NamedParamHolder(params);
-    }
-
-    /**
-     * @param params query param
-     * @return Holder
-     */
-    static Holder of(List<?> params) {
-      return new IndexedParamHolder(params);
-    }
   }
 
   private static class NamedParamHolder implements Holder {