room-details: Remove context for "_Edit" string

With the context, the string change breaks the string freeze, and it is
not necessary since it has the same meaning as the other string with the
mnemonic.

src/session/view/content/room_details/general_page.ui

@@ -190,7 +190,7 @@
                 <property name="icon-name">edit-symbolic</property>
                 <property name="use-underline">True</property>
                 <!-- Translators: In this string, 'Edit' is a verb. -->
-                <property name="label" translatable="yes" context="room details">_Edit</property>
+                <property name="label" translatable="yes">_Edit</property>
               </object>
             </child>
           </object>