8026497: Font2DTest demo: unused resource files

Reviewed-by: azvegint, bae

src/share/demo/jfc/Font2DTest/resources/TextResources.properties

-string=This is Java 2D! (Default)

src/share/demo/jfc/Font2DTest/resources/TextResources_de.properties

-string=This is Java 2D! (German) \u00f6 \u00df \u00dc

src/share/demo/jfc/Font2DTest/resources/TextResources_en.properties

-string=This is Java 2D! (English) A B C

src/share/demo/jfc/Font2DTest/resources/TextResources_en_GB.properties

-string=This is Java 2D! (English in Great Britain) \u0075 \u006b Z

src/share/demo/jfc/Font2DTest/resources/TextResources_ja.properties

-string=Java 2D\u3067\u3059\u3002(\u30C7\u30D5\u30A9\u30EB\u30C8)

src/share/demo/jfc/Font2DTest/resources/TextResources_ko.properties

-string=This is Java 2D! (Korean)

src/share/demo/jfc/Font2DTest/resources/TextResources_zh_CN.properties

-string=\u8FD9\u662F Java 2D! (\u9ED8\u8BA4\u503C)

src/share/demo/jfc/Font2DTest/resources/resource.data

-en US
-en GB
-ko KO
-ab KO
-de DE