deleted in conjunction with a refactor move

src/main/java/com/xeiam/xchart/Axis.java

src/main/java/com/xeiam/xchart/AxisPair.java

src/main/java/com/xeiam/xchart/AxisTick.java

src/main/java/com/xeiam/xchart/AxisTickLabels.java

src/main/java/com/xeiam/xchart/AxisTickMarks.java

src/main/java/com/xeiam/xchart/AxisTitle.java

src/main/java/com/xeiam/xchart/ChartTitle.java

src/main/java/com/xeiam/xchart/Legend.java

src/main/java/com/xeiam/xchart/Plot.java

src/main/java/com/xeiam/xchart/PlotContent.java

src/main/java/com/xeiam/xchart/PlotSurface.java

src/main/java/com/xeiam/xchart/XChartJPanel.java

src/main/java/com/xeiam/xchart/interfaces/IChartPart.java

src/main/java/com/xeiam/xchart/interfaces/IHideable.java

src/main/java/com/xeiam/xchart/series/Series.java

src/main/java/com/xeiam/xchart/series/SeriesColor.java

src/main/java/com/xeiam/xchart/series/SeriesLineStyle.java

src/main/java/com/xeiam/xchart/series/SeriesMarker.java

src/main/java/com/xeiam/xchart/series/markers/Circle.java

src/main/java/com/xeiam/xchart/series/markers/Diamond.java