Remove unused import

Author: MarcellPerger1

src/main/java/net/marcellperger/mathexpr/parser/Parser.java

@@ -2,7 +2,6 @@
 
 import net.marcellperger.mathexpr.*;
 import net.marcellperger.mathexpr.util.Pair;
-import net.marcellperger.mathexpr.util.Util;
 import net.marcellperger.mathexpr.util.UtilCollectors;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;

src/main/java/net/marcellperger/mathexpr/util/Util.java

@@ -9,7 +9,6 @@
 import java.util.*;
 import java.util.function.Function;
 import java.util.function.Predicate;
-import java.util.stream.Stream;
 
 @SuppressWarnings("unused")
 public class Util {