cdc: remove mention about force-replicate (#19249) (#19264)

Author: ti-chi-bot

ticdc/ticdc-overview.md

@@ -86,8 +86,6 @@ TiCDC only replicates the table that has at least one **valid index**. A **valid
     - Every column of the index is explicitly defined as non-nullable (`NOT NULL`).
     - The index does not have the virtual generated column (`VIRTUAL GENERATED COLUMNS`).
 
-Since v4.0.8, TiCDC supports replicating tables **without a valid index** by modifying the task configuration. However, this compromises the guarantee of data consistency to some extent. For more details, see [Replicate tables without a valid index](/ticdc/manage-ticdc.md#replicate-tables-without-a-valid-index).
-
 ### Unsupported scenarios
 
 Currently, the following scenarios are not supported: