Revert "Better wording in UI for in case of PDF export from Calc - tdf#90436"

This modifies the text for all applications, and puts Calc-specific text in it.
It should be done for calc only, if at all.

See comments in https://gerrit.libreoffice.org/#/c/28255/

This reverts commit 44a02cc8.

Change-Id: Ia7fd742385fa0d609007f70e5116a99729224f76
Reviewed-on: https://gerrit.libreoffice.org/29807Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

filter/uiconfig/ui/pdfgeneralpage.ui

@@ -77,7 +77,7 @@
                     </child>
                     <child>
                       <object class="GtkRadioButton" id="selection">
-                        <property name="label" translatable="yes">_Selection/Selected sheet(s)</property>
+                        <property name="label" translatable="yes">_Selection</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">False</property>