Removed unused import statement

Author: merendamattia

src/main/java/it/unipr/crosschain/checker/LocalDependencyChecker.java

@@ -16,7 +16,6 @@
 import it.unive.lisa.checks.semantic.SemanticCheck;
 import it.unive.lisa.program.cfg.CFG;
 import it.unive.lisa.program.cfg.statement.Statement;
-import java.util.Set;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;