remove unused functions and variables

Signed-off-by: Suraj Deshmukh <surajd.service@gmail.com>

Closes: #71
Approved by: rhatdan

4 files changed, 21 insertions, 44 deletions

diff --git a/libpod/common/common.go b/libpod/common/common.go
index 775d391da..8a7fbcd5e 100644
--- a/libpod/common/common.go
+++ b/libpod/common/common.go
@@ -6,7 +6,6 @@ import (
 	"syscall"
 
 	cp "github.com/containers/image/copy"
-	"github.com/containers/image/signature"
 	"github.com/containers/image/types"
 	"github.com/pkg/errors"
 )
@@ -45,15 +44,6 @@ func GetSystemContext(signaturePolicyPath, authFilePath string) *types.SystemCon
 	return sc
 }
 
-// CopyStringStringMap deep copies a map[string]string and returns the result
-func CopyStringStringMap(m map[string]string) map[string]string {
-	n := map[string]string{}
-	for k, v := range m {
-		n[k] = v
-	}
-	return n
-}
-
 // IsTrue determines whether the given string equals "true"
 func IsTrue(str string) bool {
 	return str == "true"
@@ -69,15 +59,6 @@ func IsValidBool(str string) bool {
 	return IsTrue(str) || IsFalse(str)
 }
 
-// GetPolicyContext creates a signature policy context for the given signature policy path
-func GetPolicyContext(path string) (*signature.PolicyContext, error) {
-	policy, err := signature.DefaultPolicy(&types.SystemContext{SignaturePolicyPath: path})
-	if err != nil {
-		return nil, err
-	}
-	return signature.NewPolicyContext(policy)
-}
-
 // ParseRegistryCreds takes a credentials string in the form USERNAME:PASSWORD
 // and returns a DockerAuthConfig
 func ParseRegistryCreds(creds string) (*types.DockerAuthConfig, error) {
diff --git a/libpod/diff.go b/libpod/diff.go
index 5dac56a44..3d95a8e41 100644
--- a/libpod/diff.go
+++ b/libpod/diff.go
@@ -43,11 +43,3 @@ func (r *Runtime) getLayerID(id string) (string, error) {
 	}
 	return toLayer, nil
 }
-
-func (r *Runtime) getLayerParent(layerID string) (string, error) { //nolint
-	layer, err := r.store.Layer(layerID)
-	if err != nil {
-		return "", err
-	}
-	return layer.Parent, nil
-}
diff --git a/libpod/runtime_img.go b/libpod/runtime_img.go
index 4c81380bb..2b18a5322 100644
--- a/libpod/runtime_img.go
+++ b/libpod/runtime_img.go
@@ -1,7 +1,6 @@
 package libpod
 
 import (
-	"encoding/json"
 	"fmt"
 	"io"
 	"net"
@@ -112,7 +111,6 @@ type Image struct {
 	Name           string
 	ID             string
 	fqname         string
-	hasImageLocal  bool //nolint
 	runtime        *Runtime
 	Registry       string
 	ImageName      string
@@ -1192,21 +1190,6 @@ func ParseImageNames(names []string) (tags, digests []string, err error) {
 	return tags, digests, nil
 }
 
-// Remove nolint when used
-func annotations(manifest []byte, manifestType string) map[string]string { //nolint
-	annotations := make(map[string]string)
-	switch manifestType {
-	case ociv1.MediaTypeImageManifest:
-		var m ociv1.Manifest
-		if err := json.Unmarshal(manifest, &m); err == nil {
-			for k, v := range m.Annotations {
-				annotations[k] = v
-			}
-		}
-	}
-	return annotations
-}
-
 func findImageInSlice(images []storage.Image, ref string) (storage.Image, error) {
 	for _, image := range images {
 		if MatchesID(image.ID, ref) {
diff --git a/libpod/util.go b/libpod/util.go
index c8cbfa2fc..61089b525 100644
--- a/libpod/util.go
+++ b/libpod/util.go
@@ -6,6 +6,9 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
+
+	"github.com/containers/image/signature"
+	"github.com/containers/image/types"
 )
 
 // Runtime API constants
@@ -55,3 +58,21 @@ func FuncTimer(funcName string) {
 func hasTransport(image string) bool {
 	return strings.Contains(image, "://")
 }
+
+// CopyStringStringMap deep copies a map[string]string and returns the result
+func CopyStringStringMap(m map[string]string) map[string]string {
+	n := map[string]string{}
+	for k, v := range m {
+		n[k] = v
+	}
+	return n
+}
+
+// GetPolicyContext creates a signature policy context for the given signature policy path
+func GetPolicyContext(path string) (*signature.PolicyContext, error) {
+	policy, err := signature.DefaultPolicy(&types.SystemContext{SignaturePolicyPath: path})
+	if err != nil {
+		return nil, err
+	}
+	return signature.NewPolicyContext(policy)
+}