Removed unused import

Author: Stephan Fuhrmann

core-common/src/main/java/org/glassfish/jersey/message/internal/InboundMessageContext.java

@@ -60,7 +60,6 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.StringTokenizer;
-import java.util.regex.Pattern;
 
 import javax.ws.rs.ProcessingException;
 import javax.ws.rs.core.Cookie;