Remove unused elements.

src/main/java/org/orekit/frames/ITRFVersionLoader.java

@@ -64,9 +64,6 @@ class ITRFVersionLoader {
     /** Regular expression for supported files names. */
     public static final String SUPPORTED_NAMES = "itrf-versions.conf";
 
-    /** Regular expression matching anything. */
-    private static final String ANYTHING  = ".*";
-
     /** Default entry to use if no suitable configuration is found. */
     private static final ITRFVersionConfiguration DEFAULT =
                     new ITRFVersionConfiguration("", ITRFVersion.ITRF_2014,

src/test/java/org/orekit/estimation/measurements/generation/GeneratorTest.java

@@ -32,7 +32,6 @@ import org.orekit.estimation.measurements.Range;
 import org.orekit.orbits.OrbitType;
 import org.orekit.orbits.PositionAngle;
 import org.orekit.propagation.Propagator;
-import org.orekit.propagation.SpacecraftState;
 import org.orekit.propagation.conversion.NumericalPropagatorBuilder;
 import org.orekit.propagation.events.ElevationDetector;
 import org.orekit.propagation.events.EventDetector;