Remove unused import in test.

Author: batsatt

config/config/src/test/java/io/helidon/config/EnvironmentVariablesTest.java

@@ -20,8 +20,6 @@
 import java.util.Map;
 import java.util.stream.IntStream;
 
-import io.helidon.config.EnvironmentVariables;
-
 import org.junit.jupiter.api.Test;
 
 import static io.helidon.config.EnvironmentVariables.shouldMap;