Revert "Mm 30807 granular data retention scaffold (#16891)" (#17437)

This reverts commit 3ea75332e7.

model/channel.go

@@ -53,7 +53,6 @@ type Channel struct {
 	GroupConstrained  *bool                  `json:"group_constrained"`
 	Shared            *bool                  `json:"shared"`
 	TotalMsgCountRoot int64                  `json:"total_msg_count_root"`
-	PolicyID          *string                `json:"policy_id" db:"-"`
 }
 
 type ChannelWithTeamData struct {
@@ -123,21 +122,18 @@ type ChannelModeratedRolesPatch struct {
 // PerPage number of results per page, if paginated.
 //
 type ChannelSearchOpts struct {
-	NotAssociatedToGroup     string
-	ExcludeDefaultChannels   bool
-	IncludeDeleted           bool
-	Deleted                  bool
-	ExcludeChannelNames      []string
-	TeamIds                  []string
-	GroupConstrained         bool
-	ExcludeGroupConstrained  bool
-	PolicyID                 string
-	ExcludePolicyConstrained bool
-	IncludePolicyID          bool
-	Public                   bool
-	Private                  bool
-	Page                     *int
-	PerPage                  *int
+	NotAssociatedToGroup    string
+	ExcludeDefaultChannels  bool
+	IncludeDeleted          bool
+	Deleted                 bool
+	ExcludeChannelNames     []string
+	TeamIds                 []string
+	GroupConstrained        bool
+	ExcludeGroupConstrained bool
+	Public                  bool
+	Private                 bool
+	Page                    *int
+	PerPage                 *int
 }
 
 type ChannelMemberCountByGroup struct {