[MM-53086] Remove SendWelcomePost A/B test and feature (#23733)

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/store/opentracinglayer/opentracinglayer.go

@@ -11404,24 +11404,6 @@ func (s *OpenTracingLayerUserStore) GetEtagForProfilesNotInTeam(teamID string) s
 	return result
 }
 
-func (s *OpenTracingLayerUserStore) GetFirstSystemAdminID() (string, error) {
-	origCtx := s.Root.Store.Context()
-	span, newCtx := tracing.StartSpanWithParentByContext(s.Root.Store.Context(), "UserStore.GetFirstSystemAdminID")
-	s.Root.Store.SetContext(newCtx)
-	defer func() {
-		s.Root.Store.SetContext(origCtx)
-	}()
-
-	defer span.Finish()
-	result, err := s.UserStore.GetFirstSystemAdminID()
-	if err != nil {
-		span.LogFields(spanlog.Error(err))
-		ext.Error.Set(span, true)
-	}
-
-	return result, err
-}
-
 func (s *OpenTracingLayerUserStore) GetForLogin(loginID string, allowSignInWithUsername bool, allowSignInWithEmail bool) (*model.User, error) {
 	origCtx := s.Root.Store.Context()
 	span, newCtx := tracing.StartSpanWithParentByContext(s.Root.Store.Context(), "UserStore.GetForLogin")

server/channels/store/retrylayer/retrylayer.go

@@ -13010,27 +13010,6 @@ func (s *RetryLayerUserStore) GetEtagForProfilesNotInTeam(teamID string) string
 
 }
 
-func (s *RetryLayerUserStore) GetFirstSystemAdminID() (string, error) {
-
-	tries := 0
-	for {
-		result, err := s.UserStore.GetFirstSystemAdminID()
-		if err == nil {
-			return result, nil
-		}
-		if !isRepeatableError(err) {
-			return result, err
-		}
-		tries++
-		if tries >= 3 {
-			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
-			return result, err
-		}
-		timepkg.Sleep(100 * timepkg.Millisecond)
-	}
-
-}
-
 func (s *RetryLayerUserStore) GetForLogin(loginID string, allowSignInWithUsername bool, allowSignInWithEmail bool) (*model.User, error) {
 
 	tries := 0

server/channels/store/sqlstore/user_store.go

@@ -1746,16 +1746,6 @@ func (us SqlUserStore) InferSystemInstallDate() (int64, error) {
 	return createAt, nil
 }
 
-func (us SqlUserStore) GetFirstSystemAdminID() (string, error) {
-	var id string
-	err := us.GetReplicaX().Get(&id, "SELECT Id FROM Users WHERE Roles LIKE ? ORDER BY CreateAt ASC LIMIT 1", "%system_admin%")
-	if err != nil {
-		return "", errors.Wrap(err, "failed to get first system admin")
-	}
-
-	return id, nil
-}
-
 func (us SqlUserStore) GetUsersBatchForIndexing(startTime int64, startFileID string, limit int) ([]*model.UserForIndexing, error) {
 	users := []*model.User{}
 	usersQuery, args, err := us.usersQuery.

server/channels/store/store.go

@@ -487,7 +487,6 @@ type UserStore interface {
 	IsEmpty(excludeBots bool) (bool, error)
 	GetUsersWithInvalidEmails(page int, perPage int, restrictedDomains string) ([]*model.User, error)
 	InsertUsers(users []*model.User) error
-	GetFirstSystemAdminID() (string, error)
 }
 
 type BotStore interface {

server/channels/store/storetest/mocks/UserStore.go

@@ -635,30 +635,6 @@ func (_m *UserStore) GetEtagForProfilesNotInTeam(teamID string) string {
 	return r0
 }
 
-// GetFirstSystemAdminID provides a mock function with given fields:
-func (_m *UserStore) GetFirstSystemAdminID() (string, error) {
-	ret := _m.Called()
-
-	var r0 string
-	var r1 error
-	if rf, ok := ret.Get(0).(func() (string, error)); ok {
-		return rf()
-	}
-	if rf, ok := ret.Get(0).(func() string); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Get(0).(string)
-	}
-
-	if rf, ok := ret.Get(1).(func() error); ok {
-		r1 = rf()
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
 // GetForLogin provides a mock function with given fields: loginID, allowSignInWithUsername, allowSignInWithEmail
 func (_m *UserStore) GetForLogin(loginID string, allowSignInWithUsername bool, allowSignInWithEmail bool) (*model.User, error) {
 	ret := _m.Called(loginID, allowSignInWithUsername, allowSignInWithEmail)

server/channels/store/storetest/user_store.go

@@ -94,7 +94,6 @@ func TestUserStore(t *testing.T, ss store.Store, s SqlStore) {
 	t.Run("ResetLastPictureUpdate", func(t *testing.T) { testUserStoreResetLastPictureUpdate(t, ss) })
 	t.Run("GetKnownUsers", func(t *testing.T) { testGetKnownUsers(t, ss) })
 	t.Run("GetUsersWithInvalidEmails", func(t *testing.T) { testGetUsersWithInvalidEmails(t, ss) })
-	t.Run("GetFirstSystemAdminID", func(t *testing.T) { testUserStoreGetFirstSystemAdminID(t, ss) })
 }
 
 func testUserStoreSave(t *testing.T, ss store.Store) {
@@ -4194,30 +4193,6 @@ func testCount(t *testing.T, ss store.Store) {
 	}
 }
 
-func testUserStoreGetFirstSystemAdminID(t *testing.T, ss store.Store) {
-	sysAdmin := &model.User{}
-	sysAdmin.Email = MakeEmail()
-	sysAdmin.Roles = model.SystemAdminRoleId + " " + model.SystemUserRoleId
-	sysAdmin, err := ss.User().Save(sysAdmin)
-	require.NoError(t, err)
-	defer func() { require.NoError(t, ss.User().PermanentDelete(sysAdmin.Id)) }()
-
-	// We need the second system admin to be created after the first one
-	// our granulirity is ms
-	time.Sleep(1 * time.Millisecond)
-
-	sysAdmin2 := &model.User{}
-	sysAdmin2.Email = MakeEmail()
-	sysAdmin2.Roles = model.SystemAdminRoleId + " " + model.SystemUserRoleId
-	sysAdmin2, err = ss.User().Save(sysAdmin2)
-	require.NoError(t, err)
-	defer func() { require.NoError(t, ss.User().PermanentDelete(sysAdmin2.Id)) }()
-
-	returnedId, err := ss.User().GetFirstSystemAdminID()
-	require.NoError(t, err)
-	require.Equal(t, sysAdmin.Id, returnedId)
-}
-
 func testUserStoreAnalyticsActiveCount(t *testing.T, ss store.Store, s SqlStore) {
 
 	cleanupStatusStore(t, s)

server/channels/store/timerlayer/timerlayer.go

@@ -10272,22 +10272,6 @@ func (s *TimerLayerUserStore) GetEtagForProfilesNotInTeam(teamID string) string
 	return result
 }
 
-func (s *TimerLayerUserStore) GetFirstSystemAdminID() (string, error) {
-	start := time.Now()
-
-	result, err := s.UserStore.GetFirstSystemAdminID()
-
-	elapsed := float64(time.Since(start)) / float64(time.Second)
-	if s.Root.Metrics != nil {
-		success := "false"
-		if err == nil {
-			success = "true"
-		}
-		s.Root.Metrics.ObserveStoreMethodDuration("UserStore.GetFirstSystemAdminID", success, elapsed)
-	}
-	return result, err
-}
-
 func (s *TimerLayerUserStore) GetForLogin(loginID string, allowSignInWithUsername bool, allowSignInWithEmail bool) (*model.User, error) {
 	start := time.Now()