Cleanup unused imports (TheAlgorithms#3217)

Author: HManiac74

src/main/java/com/thealgorithms/backtracking/Permutation.java

@@ -1,6 +1,5 @@
 package com.thealgorithms.backtracking;
 
-import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
 

src/main/java/com/thealgorithms/maths/Ceil.java

@@ -1,7 +1,5 @@
 package com.thealgorithms.maths;
 
-import java.util.Random;
-
 public class Ceil {
 
     /**

src/main/java/com/thealgorithms/maths/DigitalRoot.java

@@ -36,8 +36,6 @@
  */
 package com.thealgorithms.maths;
 
-import java.util.*;
-
 class DigitalRoot {
 
     public static int digitalRoot(int n) {

src/main/java/com/thealgorithms/maths/PascalTriangle.java

@@ -1,6 +1,4 @@
 package com.thealgorithms.maths;
-
-import java.util.Scanner;
 public class PascalTriangle {
     /**
      *In mathematics, Pascal's triangle is a triangular array of the binomial coefficients that arises

src/main/java/com/thealgorithms/maths/SquareRootWithBabylonianMethod.java

@@ -1,7 +1,5 @@
 package com.thealgorithms.maths;
 
-import java.util.Scanner;
-
 
 public class SquareRootWithBabylonianMethod {
     /**

src/test/java/com/thealgorithms/backtracking/CombinationTest.java

@@ -2,7 +2,6 @@
 
 import org.junit.jupiter.api.Test;
 
-import java.util.Arrays;
 import java.util.List;
 import java.util.TreeSet;
 

src/test/java/com/thealgorithms/sorts/DutchNationalFlagSortTest.java

@@ -1,8 +1,6 @@
 package com.thealgorithms.sorts;
 import org.junit.jupiter.api.Test;
 
-import java.util.Arrays;
-
 import static org.junit.jupiter.api.Assertions.*;
 
 public class DutchNationalFlagSortTest {