Removed code deprecated before 5.0.

src/main/java/org/orekit/bodies/JPLEphemeridesLoader.java

src/main/java/org/orekit/bodies/SolarSystemBody.java

...ekit/forces/gravity/potential/PotentialReaderFactory.java

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

...java/org/orekit/propagation/analytical/tle/TLESeries.java

src/main/java/org/orekit/time/GPSScale.java

src/main/java/org/orekit/time/TAIScale.java

src/main/java/org/orekit/time/TCGScale.java

src/main/java/org/orekit/time/TTScale.java

src/main/java/org/orekit/time/UTCScale.java

src/site/xdoc/changes.xml

.../org/orekit/propagation/analytical/tle/TLESeriesTest.java