cmd/utils, eth/ethconfig: remove some ancient leftover flag (ethereum#30705)

This is a flag leftover from the swarm era. No need to deprecate it,
it's been useless/dead forever now.

Author: karalabe

cmd/utils/flags.go

@@ -176,12 +176,6 @@ var (
 		Usage:    "Custom node name",
 		Category: flags.NetworkingCategory,
 	}
-	DocRootFlag = &flags.DirectoryFlag{
-		Name:     "docroot",
-		Usage:    "Document Root for HTTPClient file scheme",
-		Value:    flags.DirectoryString(flags.HomeDir()),
-		Category: flags.APICategory,
-	}
 	ExitWhenSyncedFlag = &cli.BoolFlag{
 		Name:     "exitwhensynced",
 		Usage:    "Exits after block synchronisation completes",
@@ -1755,9 +1749,6 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *ethconfig.Config) {
 			cfg.SnapshotCache = 0 // Disabled
 		}
 	}
-	if ctx.IsSet(DocRootFlag.Name) {
-		cfg.DocRoot = ctx.String(DocRootFlag.Name)
-	}
 	if ctx.IsSet(VMEnableDebugFlag.Name) {
 		// TODO(fjl): force-enable this in --dev mode
 		cfg.EnablePreimageRecording = ctx.Bool(VMEnableDebugFlag.Name)

eth/ethconfig/config.go

@@ -138,9 +138,6 @@ type Config struct {
 	VMTrace           string
 	VMTraceJsonConfig string
 
-	// Miscellaneous options
-	DocRoot string `toml:"-"`
-
 	// RPCGasCap is the global gas cap for eth-call variants.
 	RPCGasCap uint64