*: fix some lint issues

Mostly gathered these using golangci-lint's deadcode and ineffassign
linters.

Signed-off-by: Stephan Renatus <srenatus@chef.io>

connector/github/github.go

@@ -443,7 +443,7 @@ func (c *githubConnector) userOrgs(ctx context.Context, client *http.Client) ([]
 // userOrgTeams retrieves teams which current user belongs to.
 // Method returns a map where key is an org name and value list of teams under the org.
 func (c *githubConnector) userOrgTeams(ctx context.Context, client *http.Client) (map[string][]string, error) {
-	groups := make(map[string][]string, 0)
+	groups := make(map[string][]string)
 	apiURL := c.apiURL + "/user/teams"
 	for {
 		// https://developer.github.com/v3/orgs/teams/#list-user-teams

connector/gitlab/gitlab_test.go

@@ -185,13 +185,11 @@ func TestLoginWithTeamNonWhitelisted(t *testing.T) {
 }
 
 func newTestServer(responses map[string]interface{}) *httptest.Server {
-	var s *httptest.Server
-	s = httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	return httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		response := responses[r.RequestURI]
 		w.Header().Add("Content-Type", "application/json")
 		json.NewEncoder(w).Encode(response)
 	}))
-	return s
 }
 
 func newClient() *http.Client {

connector/keystone/keystone.go

@@ -241,6 +241,9 @@ func (p *conn) getUserGroups(ctx context.Context, userID string, token string) (
 	// https://developer.openstack.org/api-ref/identity/v3/#list-groups-to-which-a-user-belongs
 	groupsURL := p.Host + "/v3/users/" + userID + "/groups"
 	req, err := http.NewRequest("GET", groupsURL, nil)
+	if err != nil {
+		return nil, err
+	}
 	req.Header.Set("X-Auth-Token", token)
 	req = req.WithContext(ctx)
 	resp, err := client.Do(req)

connector/oidc/oidc.go

@@ -148,7 +148,6 @@ type oidcConnector struct {
 	redirectURI               string
 	oauth2Config              *oauth2.Config
 	verifier                  *oidc.IDTokenVerifier
-	ctx                       context.Context
 	cancel                    context.CancelFunc
 	logger                    log.Logger
 	hostedDomains             []string

connector/saml/saml.go

@@ -20,6 +20,7 @@ import (
 	"github.com/russellhaering/goxmldsig/etreeutils"
 )
 
+// nolint
 const (
 	bindingRedirect = "urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"
 	bindingPOST     = "urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"

connector/saml/saml_test.go

@@ -424,14 +424,6 @@ func TestConfigCAData(t *testing.T) {
 	}
 }
 
-const (
-	defaultSSOIssuer   = "http://www.okta.com/exk91cb99lKkKSYoy0h7"
-	defaultRedirectURI = "http://localhost:5556/dex/callback"
-
-	// Response ID embedded in our testdata.
-	testDataResponseID = "_fd1b3ef9-ec09-44a7-a66b-0d39c250f6a0"
-)
-
 // Deprecated: Use testing framework established above.
 func runVerify(t *testing.T, ca string, resp string, shouldSucceed bool) {
 	cert, err := loadCert(ca)
@@ -458,27 +450,6 @@ func runVerify(t *testing.T, ca string, resp string, shouldSucceed bool) {
 	}
 }
 
-// Deprecated: Use testing framework established above.
-func newProvider(ssoIssuer string, redirectURI string) *provider {
-	if ssoIssuer == "" {
-		ssoIssuer = defaultSSOIssuer
-	}
-	if redirectURI == "" {
-		redirectURI = defaultRedirectURI
-	}
-	now, _ := time.Parse(time.RFC3339, "2017-01-24T20:48:41Z")
-	timeFunc := func() time.Time { return now }
-	return &provider{
-		ssoIssuer:    ssoIssuer,
-		ssoURL:       "http://idp.org/saml/sso",
-		now:          timeFunc,
-		usernameAttr: "user",
-		emailAttr:    "email",
-		redirectURI:  redirectURI,
-		logger:       logrus.New(),
-	}
-}
-
 func TestVerify(t *testing.T) {
 	runVerify(t, "testdata/okta-ca.pem", "testdata/okta-resp.xml", true)
 }