Layouts: Remove "show_numbers_from_symbols" where it is not used

or a copy of "show_numbers".

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/643>

data/keyboards/ro.yaml

@@ -25,7 +25,7 @@ views:
     symbols:
         - "~ ` | · √ π τ ÷ × ¶"
         - "© ® £ $ ¥ ^ ° * { }"
-        - "show_numbers_from_symbols   \\ / < > = [ ]  BackSpace"
+        - "show_numbers   \\ / < > = [ ]  BackSpace"
         - "show_letters show_eschars preferences         space        , Return"
     eschars:
         - "ă â î ș ț á é í ó ü"
@@ -54,11 +54,6 @@ buttons:
             set_view: "numbers"
         outline: "altline"
         label: "123"
-    show_numbers_from_symbols:
-        action:
-            set_view: "numbers"
-        outline: "altline"
-        label: "123"
     show_letters:
         action:
             set_view: "base"