FXOLAT-358: remove empty classes and unused i18n files

src/main/java/de/bps/commons/calendar/ui/components/_i18n/LocalStrings_zh_TW.properties

-#Tue Jun 23 18:25:21 CEST 2009
-notifications.entry=\u4E8B\u4EF6\u88AB\u4FEE\u6539\u65BC {0}
-notifications.header=\u6709\u65B0\u7684/\u4FEE\u6539\u7684\u4E8B\u4EF6\u5728\u60A8\u6240\u8A02\u95B1\u7684\u884C\u4E8B\u66C6\uFF1A

src/main/java/org/olat/admin/translations/_i18n/LocalStrings_vi.properties

-titleX=
-form.localesX=
-form.bundlesX=
-form.textX=
-form.searchX=
-button.createallX=
-button.listworkX=
-
-command.previewchelpX=
-button.createchelpX=
-button.showredundancyX=
-
-keysorvaluesX=
-
-form.reflocalesX=
-
-toggle.searchX=
-toggle.functionsX=
-toggle.choiceX=
-
-localstrings.file.deletedX=
-info.duplicate.keysX=
-
-source.file.notexistingX=

src/main/java/org/olat/admin/translations/_i18n/LocalStrings_zh_TW.properties

-title = \u7DDA\u4E0A\u7FFB\u8B6F\u5DE5\u5177
-form.locales = \u76EE\u7684\u8A9E\u8A00
-form.bundles = \u5957\u4EF6
-form.text = \u65B0\u5EFA
-form.search = \u641C\u5C0B
-button.createall = \u5EFA\u7ACB\u6240\u6709\u7684 ToDos
-button.listwork = \u986F\u793A\u6709\u907A\u6F0F\u6216\u4E0D\u5FC5\u8981\u7684\u95DC\u9375\u5B57\u7684\u5957\u4EF6
-
-command.previewchelp = \u986F\u793A\u4E0A\u4E0B\u6587\u8AAA\u660E
-button.createchelp =\u5EFA\u7ACB\u4E0A\u4E0B\u6587\u8AAA\u660E\u6A94
-button.showredundancy = \u986F\u793A\u591A\u9918\u7684\u7FFB\u8B6F
-
-keysorvalues=\u51FA\u73FE\u5728
-
-form.reflocales=\u53C3\u8003\u8A9E\u8A00
-
-toggle.search = \u641C\u5C0B
-toggle.functions = \u529F\u80FD
-toggle.choice = \u9078\u64C7\u8A9E\u8A00\u548C\u5957\u4EF6
-
-localstrings.file.deleted=\u7FFB\u8B6F\u6A94\u5DF2\u522A\u9664\u3002\u5B83\u6C92\u6709\u5305\u542B\u4EFB\u4F55\u9805\u76EE\u3002
-info.duplicate.keys=\u591A\u9918\u7684\u9375\u5DF2\u79FB\u9664\u3002
-
-source.file.notexisting= <\u6C92\u6709\u539F\u59CB\u6A94\u6848>

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_ar.properties

-#Sun Feb 21 13:40:35 CET 2010
-command.closePreview=\u0625\u063A\u0644\u0627\u0642 \u0627\u0644\u0645\u0639\u0627\u064A\u0646\u0629

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_bg.properties

-#Mon May 25 15:07:35 CEST 2009
-command.closePreview=\u0417\u0430\u0442\u0432\u043E\u0440\u0435\u0442\u0435 \u043F\u0440\u0435\u0433\u043B\u0435\u0434

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_cs.properties

-#Mon Mar 02 09:54:14 CET 2009
-command.closePreview=Zav\u0159\u00EDt n\u00E1hled

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_da.properties

-#Mon Mar 02 09:54:09 CET 2009
-command.closePreview=Luk forh\u00E5ndsvisning

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_de.properties

-#Mon Mar 02 09:54:04 CET 2009
-command.closePreview=Vorschau schliessen

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_el.properties

-#Mon Mar 02 09:54:16 CET 2009
-command.closePreview=\u039A\u03BB\u03B5\u03AF\u03C3\u03B9\u03BC\u03BF \u03C0\u03C1\u03BF\u03B5\u03C0\u03B9\u03C3\u03BA\u03CC\u03C0\u03B7\u03C3\u03B7\u03C2

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_en.properties

-#Mon Mar 02 09:54:18 CET 2009
-command.closePreview=Close preview

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_es.properties

-#Mon Mar 02 09:54:21 CET 2009
-command.closePreview=Cerrar vista previa

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_fa.properties

-#Mon Mar 02 09:54:13 CET 2009
-command.closePreview=\u0628\u0633\u062A\u0646 \u067E\u06CC\u0634 \u0646\u0645\u0627\u06CC\u0634

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_fr.properties

-#Mon Mar 02 09:54:08 CET 2009
-command.closePreview=Fermer aper\u00E7u

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_it.properties

-#Mon Mar 02 09:54:10 CET 2009
-command.closePreview=Chiudi anteprima

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_jp.properties

-#Thu Jul 23 22:08:21 CEST 2009
-command.closePreview=\u30D7\u30EC\u30D3\u30E5\u30FC\u3092\u9589\u3058\u308B

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_ko.properties

-#Tue Aug 04 19:20:34 CEST 2009
-command.closePreview=\uBBF8\uB9AC\uBCF4\uAE30 \uB2EB\uAE30

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_lt.properties

-#Mon Mar 02 09:54:02 CET 2009
-command.closePreview=U\u017Edaryti per\u017Ei\u016Br\u0105

src/main/java/org/olat/modules/qe/_i18n/LocalStrings_nl_NL.properties

-#Thu Sep 08 16:42:46 CEST 2011
-command.closePreview=Sluit voorvertoning