diff --git a/.changes/unreleased/BREAKING CHANGES-20230606-092955.yaml b/.changes/unreleased/BREAKING CHANGES-20230606-092955.yaml
new file mode 100644
index 00000000..cd09d3b2
--- /dev/null
+++ b/.changes/unreleased/BREAKING CHANGES-20230606-092955.yaml	
@@ -0,0 +1,6 @@
+kind: BREAKING CHANGES
+body: 'generate: The `legacy-sidebar` flag has been removed without replacement. It
+  implemented no logic and is not necessary with Terraform Registry based documentation'
+time: 2023-06-06T09:29:55.309657-04:00
+custom:
+  Issue: "258"
diff --git a/README.md b/README.md
index 114d2260..97f16ae9 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,6 @@ Usage: tfplugindocs generate [<args>]
 
     --examples-dir <ARG>             examples directory                                                        (default: "examples")
     --ignore-deprecated <ARG>        don't generate documentation for deprecated resources and data-sources    (default: "false")
-    --legacy-sidebar <ARG>           generate the legacy .erb sidebar file                                     (default: "false")
     --provider-name <ARG>            provider name, as used in Terraform configurations
     --rendered-provider-name <ARG>   provider name, as generated in documentation (ex. page titles, ...)
     --rendered-website-dir <ARG>     output directory                                                          (default: "docs")
diff --git a/internal/cmd/generate.go b/internal/cmd/generate.go
index 14275961..3bd3468d 100644
--- a/internal/cmd/generate.go
+++ b/internal/cmd/generate.go
@@ -14,7 +14,6 @@ import (
 type generateCmd struct {
 	commonCmd
 
-	flagLegacySidebar    bool
 	flagIgnoreDeprecated bool
 
 	flagProviderName         string
@@ -71,7 +70,6 @@ func (cmd *generateCmd) Help() string {
 
 func (cmd *generateCmd) Flags() *flag.FlagSet {
 	fs := flag.NewFlagSet("generate", flag.ExitOnError)
-	fs.BoolVar(&cmd.flagLegacySidebar, "legacy-sidebar", false, "generate the legacy .erb sidebar file")
 	fs.StringVar(&cmd.flagProviderName, "provider-name", "", "provider name, as used in Terraform configurations")
 	fs.StringVar(&cmd.flagRenderedProviderName, "rendered-provider-name", "", "provider name, as generated in documentation (ex. page titles, ...)")
 	fs.StringVar(&cmd.flagRenderedWebsiteDir, "rendered-website-dir", "docs", "output directory")
@@ -97,7 +95,6 @@ func (cmd *generateCmd) Run(args []string) int {
 func (cmd *generateCmd) runInternal() error {
 	err := provider.Generate(
 		cmd.ui,
-		cmd.flagLegacySidebar,
 		cmd.flagProviderName,
 		cmd.flagRenderedProviderName,
 		cmd.flagRenderedWebsiteDir,
diff --git a/internal/provider/generate.go b/internal/provider/generate.go
index 46f76664..388368b6 100644
--- a/internal/provider/generate.go
+++ b/internal/provider/generate.go
@@ -67,7 +67,6 @@ var (
 
 type generator struct {
 	ignoreDeprecated bool
-	legacySidebar    bool
 	tfVersion        string
 
 	providerName         string
@@ -88,10 +87,9 @@ func (g *generator) warnf(format string, a ...interface{}) {
 	g.ui.Warn(fmt.Sprintf(format, a...))
 }
 
-func Generate(ui cli.Ui, legacySidebar bool, providerName, renderedProviderName, renderedWebsiteDir, examplesDir, websiteTmpDir, websiteSourceDir, tfVersion string, ignoreDeprecated bool) error {
+func Generate(ui cli.Ui, providerName, renderedProviderName, renderedWebsiteDir, examplesDir, websiteTmpDir, websiteSourceDir, tfVersion string, ignoreDeprecated bool) error {
 	g := &generator{
 		ignoreDeprecated: ignoreDeprecated,
-		legacySidebar:    legacySidebar,
 		tfVersion:        tfVersion,
 
 		providerName:         providerName,
@@ -185,12 +183,6 @@ func (g *generator) Generate(ctx context.Context) error {
 		return err
 	}
 
-	// TODO: may not ever need this, unsure on when this will go live
-	if g.legacySidebar {
-		g.infof("rendering legacy sidebar...")
-		g.warnf("TODO...!")
-	}
-
 	return nil
 }