[fstab] Remove schema-entry for mountOptions

These were removed from the module in commit
	03f2e45605
but later restored by a botched merge.

src/modules/fstab/fstab.schema.yaml

@@ -6,24 +6,6 @@ $id: https://calamares.io/schemas/fstab
 additionalProperties: false
 type: object
 properties:
-    mountOptions:
-        type: object
-        additionalProperties: true  # we don't know which FS exist
-        properties:
-            "default": { type: string }
-            btrfs: { type: string }
-        required: [ "default" ]
-    ssdExtraMountOptions:
-        type: object
-        additionalProperties: true  # we don't know which FS exist
-        properties:
-            ext4: { type: string }
-            jfs: { type: string }
-            xfs: { type: string }
-            swap: { type: string }
-            btrfs: { type: string }
-            btrfs_swap: { type: string }
-    efiMountOptions: { type: string }
     crypttabOptions: { type: string }
     tmpOptions:
         type: object
@@ -43,5 +25,4 @@ properties:
                     options: { type: string }
         required: [ "default" ]
 required:
-    - mountOptions
     - tmpOptions