Remove obsolete endpoint

Search by index is the same as a search with only a `content:`
expression.

modules/restapi/src/main/resources/docspell-openapi.yml

@@ -3028,40 +3028,6 @@ paths:
               schema:
                 $ref: "#/components/schemas/ItemLightList"
 
-  /sec/item/searchIndex:
-    post:
-      operationId: "sec-item-search-index"
-      tags: [ Item Search ]
-      summary: Search for items using full-text search only.
-      description: |
-        Search for items by only using the full-text search index.
-
-        Unlike the other search routes, this one only asks the
-        full-text search index and returns only one group that
-        contains the results in the same order as given from the
-        index. Most full-text search engines use an ordering that
-        reflect the relevance wrt the search term.
-
-        The other search routes always order the results by some
-        property (the item date) and thus the relevance ordering is
-        destroyed when using the full-text search.
-      security:
-        - authTokenHeader: []
-      requestBody:
-        content:
-          application/json:
-            schema:
-              $ref: "#/components/schemas/ItemQuery"
-      responses:
-        422:
-          description: BadRequest
-        200:
-          description: Ok
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/ItemLightList"
-
   /sec/item/searchStats:
     post:
       operationId: "sec-item-search-stats-get"

modules/restserver/src/main/scala/docspell/restserver/routes/ItemRoutes.scala

@@ -13,7 +13,6 @@ import cats.implicits._
 import docspell.backend.BackendApp
 import docspell.backend.auth.AuthToken
 import docspell.backend.ops.OCustomFields.{RemoveValue, SetValue}
-import docspell.backend.ops.OFulltext
 import docspell.backend.ops.OItemSearch.{Batch, Query}
 import docspell.backend.ops.OSimpleSearch
 import docspell.backend.ops.OSimpleSearch.StringSearchResult
@@ -107,30 +106,6 @@ object ItemRoutes {
             resp <- searchItemStats(backend, dsl)(settings, fixQuery, itemQuery)
           } yield resp
 
-        case req @ POST -> Root / "searchIndex" =>
-          for {
-            mask <- req.as[ItemQuery]
-            limitCapped = mask.limit.exists(_ > cfg.maxItemPageSize)
-            resp <- mask.query match {
-              case q if q.length > 1 =>
-                val ftsIn = OFulltext.FtsInput(q)
-                val batch = Batch(
-                  mask.offset.getOrElse(0),
-                  mask.limit.getOrElse(cfg.maxItemPageSize)
-                ).restrictLimitTo(cfg.maxItemPageSize)
-                for {
-                  items <- backend.fulltext
-                    .findIndexOnly(cfg.maxNoteLength)(ftsIn, user.account, batch)
-                  ok <- Ok(
-                    Conversions.mkItemListWithTagsFtsPlain(items, batch, limitCapped)
-                  )
-                } yield ok
-
-              case _ =>
-                BadRequest(BasicResult(false, "Query string too short"))
-            }
-          } yield resp
-
         case GET -> Root / Ident(id) =>
           for {
             item <- backend.itemSearch.findItem(id, user.account.collective)