chore: cleanup gapicgen a bit (#7703)

- remove generating module feature, only do this with owlbot now
- remove all confings no longer being generated
- remove generation of manifest, owlbot does this now

internal/gapicgen/cmd/genbot/local.go

@@ -38,7 +38,6 @@ type localConfig struct {
  onlyGapics bool
  regenOnly bool
  forceAll bool
- genModule bool
  genAlias bool
 }
 
@@ -75,7 +74,6 @@ func genLocal(ctx context.Context, c localConfig) error {
  LocalMode: true,
  RegenOnly: c.regenOnly,
  ForceAll: c.forceAll,
- GenModule: c.genModule,
  GenAlias: c.genAlias,
  }
  if _, err := generator.Generate(ctx, conf); err != nil {

internal/gapicgen/cmd/genbot/main.go

@@ -54,7 +54,6 @@ func main() {
  gapicToGenerate := flag.String("gapic", os.Getenv("GAPIC_TO_GENERATE"), `Specifies which gapic to generate. The value should be in the form of an import path (Ex: cloud.google.com/go/pubsub/apiv1). The default "" generates all gapics.`)
  onlyGapics := flag.Bool("only-gapics", strToBool(os.Getenv("ONLY_GAPICS")), "Enabling stops regenerating genproto.")
  regenOnly := flag.Bool("regen-only", strToBool(os.Getenv("REGEN_ONLY")), "Enabling means no vetting, manifest updates, or compilation.")
- genModule := flag.Bool("generate-module", strToBool(os.Getenv("GENERATE_MODULE")), "Enabling means a new module will be generated for API being generated.")
  genAlias := flag.Bool("generate-alias", strToBool(os.Getenv("GENERATE_ALIAS")), "Enabling means alias files will be generated.")
 
  flag.Parse()
@@ -69,7 +68,6 @@ func main() {
  onlyGapics: *onlyGapics,
  regenOnly: *regenOnly,
  forceAll: *forceAll,
- genModule: *genModule,
  genAlias: *genAlias,
  }); err != nil {
  log.Fatal(err)