Revert "Support for Embeded chat (#9129)" (#10017)

This reverts commit 3fcecd521a.

model/config.go

@@ -979,21 +979,6 @@ func (s *EmailSettings) SetDefaults() {
 	}
 }
 
-type ExtensionSettings struct {
-	EnableExperimentalExtensions *bool
-	AllowedExtensionsIDs         []string
-}
-
-func (s *ExtensionSettings) SetDefaults() {
-	if s.EnableExperimentalExtensions == nil {
-		s.EnableExperimentalExtensions = NewBool(false)
-	}
-
-	if s.AllowedExtensionsIDs == nil {
-		s.AllowedExtensionsIDs = []string{}
-	}
-}
-
 type RateLimitSettings struct {
 	Enable           *bool
 	PerSec           *int
@@ -1933,7 +1918,6 @@ type Config struct {
 	PasswordSettings      PasswordSettings
 	FileSettings          FileSettings
 	EmailSettings         EmailSettings
-	ExtensionSettings     ExtensionSettings
 	RateLimitSettings     RateLimitSettings
 	PrivacySettings       PrivacySettings
 	SupportSettings       SupportSettings
@@ -2029,7 +2013,6 @@ func (o *Config) SetDefaults() {
 	o.MessageExportSettings.SetDefaults()
 	o.TimezoneSettings.SetDefaults()
 	o.DisplaySettings.SetDefaults()
-	o.ExtensionSettings.SetDefaults()
 }
 
 func (o *Config) IsValid() *AppError {