Revert "Explore: Add Mixed Datasource (#51605)" (#52889)

This reverts commit e2258120e7.

pkg/services/featuremgmt/registry.go

@@ -159,12 +159,6 @@ var (
 			State:        FeatureStateBeta,
 			FrontendOnly: true,
 		},
-		{
-			Name:         "exploreMixedDatasource",
-			Description:  "Enable mixed datasource in Explore",
-			State:        FeatureStateAlpha,
-			FrontendOnly: true,
-		},
 		{
 			Name:         "tracing",
 			Description:  "Adds trace ID to error notifications",

pkg/services/featuremgmt/toggles_gen.go

@@ -119,10 +119,6 @@ const (
 	// Experimental Explore to Dashboard workflow
 	FlagExplore2Dashboard = "explore2Dashboard"
 
-	// FlagExploreMixedDatasource
-	// Enable mixed datasource in Explore
-	FlagExploreMixedDatasource = "exploreMixedDatasource"
-
 	// FlagTracing
 	// Adds trace ID to error notifications
 	FlagTracing = "tracing"