Remove Cert Cert Directory Environment key and flag

Signed-off-by: Sunil Kumar<suryakn27@outlook.com>

cmd/helm/testdata/output/env-comp.txt

@@ -15,6 +15,5 @@ HELM_PLUGINS
 HELM_REGISTRY_CONFIG
 HELM_REPOSITORY_CACHE
 HELM_REPOSITORY_CONFIG
-HELM_CLIENT_TLS_CERT_DIR
 :4
 Completion ended with directive: ShellCompDirectiveNoFileComp

pkg/cli/environment.go

@@ -118,7 +118,6 @@ func (s *EnvSettings) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.RegistryConfig, "registry-config", s.RegistryConfig, "path to the registry config file")
 	fs.StringVar(&s.RepositoryConfig, "repository-config", s.RepositoryConfig, "path to the file containing repository names and URLs")
 	fs.StringVar(&s.RepositoryCache, "repository-cache", s.RepositoryCache, "path to the file containing cached repository indexes")
-	fs.StringVar(&s.ClientSecCertDirectory, "client-sec-cert-dir", s.ClientSecCertDirectory, "path to the secondary certificate directory used for 2-way ssl support(oci pull for artificat repo)")
 }
 
 func envOr(name, def string) string {