Fix for empty Ranks column on the Skills tab (#7339)

A renderer was being created that wasn't returning a usable
TableCellRenderer.  By not registering a "custom" renderer, the default
provided by JSpinner is used -- and that one works fine.

Author: Azhrei

code/src/java/pcgen/gui2/tabs/SkillInfoTab.java

@@ -123,9 +123,6 @@ private void initComponents()
 		setOrientation(VERTICAL_SPLIT);
 		setResizeWeight(0.70);
 
-		JSpinner spinner = new JSpinner();
-		spinner.setEditor(new JSpinner.NumberEditor(spinner, "#0.#")); //$NON-NLS-1$
-		skillTable.setDefaultRenderer(Float.class, new SpinnerRenderer(spinner));
 		skillTable.setDefaultRenderer(Integer.class, new TableCellUtilities.AlignRenderer(SwingConstants.CENTER));
 		skillTable.setDefaultRenderer(String.class, new TableCellUtilities.AlignRenderer(SwingConstants.CENTER));
 		skillTable.setRowHeight(26);