Refactoring ineffectual assignments

This patch fixed below 4 types of code line
1. Remove unnecessary variable assignment
2. Use variables declaration instead of explicit initial zero value
3. Change variable name to underbar when variable not used
4. Add erro check and return for ignored error

Signed-off-by: Daehyeok Mun <daehyeok@gmail.com>
Upstream-commit: 266900235c
Component: cli

components/cli/command/plugin/create.go

@@ -41,7 +41,9 @@ func validateConfig(path string) error {
 // validateContextDir validates the given dir and returns abs path on success.
 func validateContextDir(contextDir string) (string, error) {
 	absContextDir, err := filepath.Abs(contextDir)
-
+	if err != nil {
+		return "", err
+	}
 	stat, err := os.Lstat(absContextDir)
 	if err != nil {
 		return "", err