style: enable RedundantModifier in checkstyle (#5140)

src/main/java/com/thealgorithms/others/Dijkstra.java

@@ -61,7 +61,7 @@ class Graph {
         public final String v1, v2;
         public final int dist;
 
-        public Edge(String v1, String v2, int dist) {
+        Edge(String v1, String v2, int dist) {
             this.v1 = v1;
             this.v2 = v2;
             this.dist = dist;
@@ -79,7 +79,7 @@ class Graph {
         public Vertex previous = null;
         public final Map<Vertex, Integer> neighbours = new HashMap<>();
 
-        public Vertex(String name) {
+        Vertex(String name) {
             this.name = name;
         }
 
@@ -147,7 +147,7 @@ class Graph {
     /**
      * Builds a graph from a set of edges
      */
-    public Graph(Edge[] edges) {
+    Graph(Edge[] edges) {
         graph = new HashMap<>(edges.length);
 
         // one pass to find all vertices

src/main/java/com/thealgorithms/others/KochSnowflake.java

@@ -176,7 +176,7 @@ public class KochSnowflake {
 
         double x, y;
 
-        public Vector2(double x, double y) {
+        Vector2(double x, double y) {
             this.x = x;
             this.y = y;
         }

src/main/java/com/thealgorithms/others/QueueUsingTwoStacks.java

@@ -25,7 +25,7 @@ class QueueWithStack {
     /**
      * Constructor
      */
-    public QueueWithStack() {
+    QueueWithStack() {
         this.inStack = new Stack<>();
         this.outStack = new Stack<>();
     }

src/main/java/com/thealgorithms/others/TopKWords.java

@@ -11,7 +11,7 @@ public class TopKWords {
 
         private String fileName;
 
-        public CountWords(String fileName) {
+        CountWords(String fileName) {
             this.fileName = fileName;
         }