removing public declaration from interfaces

src/org/opensha2/calc/NamedLocation.java

src/org/opensha2/data/XY_Point.java

src/org/opensha2/data/XY_Sequence.java

src/org/opensha2/eq/model/GridSourceSet.java

src/org/opensha2/gmm/GroundMotionModel.java

src/org/opensha2/gmm/ScalarGroundMotion.java

src/org/opensha2/programs/HazardCurve.java

src/org/opensha2/util/Named.java