chore: Remove deprecated extensions commands (#1173)

Long deprecated, let's remove it to declutter.

Test plan: Other commands still work locally.

The deprecated `src extensions` commands have been removed.

Author: eseliger

CHANGELOG.md

@@ -15,6 +15,10 @@ All notable changes to `src-cli` are documented in this file.
 
 - SBOM support: Added `--image` and `--exclude-image` flags to `src sbom fetch` for filtering which docker images SBOMs are fetched for. Both flags support glob patterns (e.g., `frontend`, `*api*`) and comma-separated lists. The `sourcegraph/` image name prefix is optional.
 
+### Changed
+
+- The deprecated `src extensions` commands have been removed.
+
 ## 6.4.0
 
 ## 6.3.0

cmd/src/cmd.go

@@ -6,9 +6,6 @@ import (
 	"log"
 	"os"
 	"slices"
-	"strings"
-
-	"github.com/sourcegraph/sourcegraph/lib/errors"
 
 	"github.com/sourcegraph/src-cli/internal/cmderrors"
 )
@@ -128,16 +125,3 @@ func (c commander) run(flagSet *flag.FlagSet, cmdName, usageText string, args []
 	log.Printf("%s: unknown subcommand %q", cmdName, name)
 	log.Fatalf("Run '%s help' for usage.", cmdName)
 }
-
-func didYouMeanOtherCommand(actual string, suggested []string) *command {
-	fullSuggestions := make([]string, len(suggested))
-	for i, s := range suggested {
-		fullSuggestions[i] = "src " + s
-	}
-	msg := fmt.Sprintf("src: unknown subcommand %q\n\nDid you mean:\n\n\t%s", actual, strings.Join(fullSuggestions, "\n\t"))
-	return &command{
-		flagSet:   flag.NewFlagSet(actual, flag.ExitOnError),
-		handler:   func(args []string) error { return errors.New(msg) },
-		usageFunc: func() { log.Println(msg) },
-	}
-}

cmd/src/doc.go

@@ -56,7 +56,6 @@ Examples:
 			"":             &commands,
 			"batch":        &batchCommands,
 			"config":       &configCommands,
-			"extensions":   &extensionsCommands,
 			"extsvc":       &extsvcCommands,
 			"code-intel":   &codeintelCommands,
 			"orgs":         &orgsCommands,