Issue #3485764: Remove dash from schema

Closes #3485764

config/schema/fallback_formatter.schema.yml

@@ -6,18 +6,18 @@ field.formatter.settings.fallback:
       type: sequence
       label: 'Formatters'
       sequence:
-        - type: mapping
-          label: 'Formatter settings'
-          mapping:
-            status:
-              type: boolean
-              label: 'Status'
-            weight:
-              type: integer
-              label: 'Weight'
-            formatter:
-              type: string
-              label: 'Formatter'
-            settings:
-              type: field.formatter.settings.[%parent.formatter]
-              label: 'Settings'
+        type: mapping
+        label: 'Formatter settings'
+        mapping:
+          status:
+            type: boolean
+            label: 'Status'
+          weight:
+            type: integer
+            label: 'Weight'
+          formatter:
+            type: string
+            label: 'Formatter'
+          settings:
+            type: field.formatter.settings.[%parent.formatter]
+            label: 'Settings'