remove superfluous " at end of string

Change-Id: Id5280f3ea136e061f4c1e21a60aeedf2d56d0bea

desktop/uiconfig/ui/licensedialog.ui

@@ -146,7 +146,7 @@
                     <property name="valign">start</property>
                     <property name="hexpand">True</property>
                     <property name="xalign">0</property>
-                    <property name="label" translatable="yes">Read the complete License Agreement. Use the scroll bar or the 'Scroll Down' button in this dialog to view the entire license text."</property>
+                    <property name="label" translatable="yes">Read the complete License Agreement. Use the scroll bar or the 'Scroll Down' button in this dialog to view the entire license text.</property>
                     <property name="wrap">True</property>
                     <property name="max_width_chars">55</property>
                   </object>