Remove unused import

Author: Hardvan

src/test/java/com/thealgorithms/stacks/InfixToPrefixTest.java

@@ -1,7 +1,6 @@
 package com.thealgorithms.stacks;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.util.stream.Stream;
 import org.junit.jupiter.params.ParameterizedTest;