Remove redundant modifiers like private on enum constructors.

Author: garydgregory

src/main/java/org/apache/commons/codec/digest/HmacAlgorithms.java

@@ -89,7 +89,7 @@ public enum HmacAlgorithms {
 
     private final String name;
 
-    private HmacAlgorithms(final String algorithm) {
+    HmacAlgorithms(final String algorithm) {
         this.name = algorithm;
     }