style: enable AvoidStarImport in checkstyle (#5141)

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

@@ -1,6 +1,6 @@
 package com.thealgorithms.maths;
 
-import java.util.*;
+import java.util.Scanner;
 
 /*
  * @author Ojasva Jain

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

@@ -1,7 +1,8 @@
 package com.thealgorithms.maths;
 
 import java.math.BigInteger;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.List;
 
 public class KaprekarNumbers {
 

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

@@ -1,6 +1,8 @@
 package com.thealgorithms.maths;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Scanner;
 
 class KeithNumber {
 

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

@@ -5,7 +5,9 @@ A number is a Krishnamurthy number if the sum of the factorials of the digits of
 to the number itself. For example, 1, 2 and 145 are Krishnamurthy numbers. Krishnamurthy number is
 also referred to as a Strong number.
  */
-import java.io.*;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
 
 public class KrishnamurthyNumber {
 

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

@@ -1,6 +1,6 @@
 package com.thealgorithms.maths;
 
-import java.util.*;
+import java.util.Scanner;
 
 /**
  * Is a common mathematics concept to find the smallest value number

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

@@ -1,6 +1,6 @@
 package com.thealgorithms.maths;
 
-import java.util.*;
+import java.util.Scanner;
 
 /*A magic square of order n is an arrangement of distinct n^2 integers,in a square, such that the n
 numbers in all rows, all columns, and both diagonals sum to the same constant. A magic square