Removed duplicated code in Rinex clock file parser.

src/main/java/org/orekit/gnss/clock/RinexClockParser.java

@@ -330,14 +330,6 @@ public class RinexClockParser {
                 }
             }
 
-            /** {@inheritDoc} */
-            @Override
-            public Stream<LineParser> allowedNext() {
-                return Stream.of(HEADER_PROGRAM, HEADER_COMMENT, HEADER_SYSTEM_OBS, HEADER_SYSTEM_OBS_CONTINUATION, HEADER_TIME_SYSTEM, HEADER_LEAP_SECONDS,
-                                 HEADER_LEAP_SECONDS_GNSS, HEADER_DCBS, HEADER_PCVS, HEADER_TYPES_OF_DATA, HEADER_STATIONS_NAME, HEADER_STATION_CLOCK_REF,
-                                 HEADER_ANALYSIS_CENTER, HEADER_NUMBER_OF_CLOCK_REF, HEADER_ANALYSIS_CLOCK_REF, HEADER_NUMBER_OF_SOLN_STATIONS,
-                                 HEADER_SOLN_STATIONS, HEADER_NUMBER_OF_SOLN_SATS, HEADER_PRN_LIST, HEADER_END);
-            }
         },
 
         /** Parser for generating program and emiting agency. */