Remove preposition

The translator has advised that we can drop the 'o' proposition from the
Welsh translation of the comparison title, which means that we can
avoid having to make the mutations

config/locales/cy.yml

@@ -202,7 +202,7 @@ cy:
       dates_to: "hyd at"
       validation_dates: "Rhaid i’r dyddiad dechrau fod yn gynharach na’r dyddiad diwedd"
       for_locations: "Ar gyfer lleoliadau:"
-      title: "Cymharu %{indLabel} o %{statLabel} ar gyfer %{locLabel}"
+      title: "Cymharu %{indLabel} %{statLabel} ar gyfer %{locLabel}"
       zero_locations: "dim lleoliadau"
       one_locations: "un lleoliad"
       two_locations: "dau leoliad"