MM-54181 : Clean up code around deprecated Gfycat (#24343)

* first pass of removal

* first pass of removal

* Update admin_console.js

* rev beta

* remove more

* Update initial_state.ts

---------

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

server/platform/services/telemetry/telemetry.go

@@ -419,8 +419,6 @@ func (ts *TelemetryService) trackConfig() {
 		"enable_custom_emoji":                                     *cfg.ServiceSettings.EnableCustomEmoji,
 		"enable_emoji_picker":                                     *cfg.ServiceSettings.EnableEmojiPicker,
 		"enable_gif_picker":                                       *cfg.ServiceSettings.EnableGifPicker,
-		"gfycat_api_key":                                          isDefault(*cfg.ServiceSettings.GfycatAPIKey, model.ServiceSettingsDefaultGfycatAPIKey),
-		"gfycat_api_secret":                                       isDefault(*cfg.ServiceSettings.GfycatAPISecret, model.ServiceSettingsDefaultGfycatAPISecret),
 		"experimental_enable_authentication_transfer":             *cfg.ServiceSettings.ExperimentalEnableAuthenticationTransfer,
 		"enable_testing":                                          cfg.ServiceSettings.EnableTesting,
 		"enable_developer":                                        *cfg.ServiceSettings.EnableDeveloper,