Revert "[elastic-agent] Fix docker tar.gz generation for complete ima…

…ge (#27621)"

This reverts commit 89e415d.

dev-tools/mage/dockerbuilder.go

@@ -86,7 +86,7 @@ func (b *dockerBuilder) Build() error {
 			return errors.Wrap(err, "failed to build docker")
 		}
 
-		if err := b.dockerSave(tag, variant); err != nil {
+		if err := b.dockerSave(tag); err != nil {
 			return errors.Wrap(err, "failed to save docker as artifact")
 		}
 	}
@@ -209,7 +209,7 @@ func (b *dockerBuilder) dockerBuild(variant string) (string, error) {
 	return taggedImageName, sh.Run("docker", "build", "-t", taggedImageName, b.buildDir)
 }
 
-func (b *dockerBuilder) dockerSave(tag string, variant string) error {
+func (b *dockerBuilder) dockerSave(tag string) error {
 	if _, err := os.Stat(distributionsDir); os.IsNotExist(err) {
 		err := os.MkdirAll(distributionsDir, 0750)
 		if err != nil {
@@ -220,8 +220,7 @@ func (b *dockerBuilder) dockerSave(tag string, variant string) error {
 	outputFile := b.OutputFile
 	if outputFile == "" {
 		outputTar, err := b.Expand(defaultBinaryName+".docker.tar.gz", map[string]interface{}{
-			"Name":    b.imageName,
-			"Variant": variant,
+			"Name": b.imageName,
 		})
 		if err != nil {
 			return err

dev-tools/mage/pkgtypes.go

@@ -48,7 +48,7 @@ const (
 	packageStagingDir = "build/package"
 
 	// defaultBinaryName specifies the output file for zip and tar.gz.
-	defaultBinaryName = "{{.Name}}-{{if .Variant}}{{.Variant}}-{{end}}{{.Version}}{{if .Snapshot}}-SNAPSHOT{{end}}{{if .OS}}-{{.OS}}{{end}}{{if .Arch}}-{{.Arch}}{{end}}"
+	defaultBinaryName = "{{.Name}}-{{.Version}}{{if .Snapshot}}-SNAPSHOT{{end}}{{if .OS}}-{{.OS}}{{end}}{{if .Arch}}-{{.Arch}}{{end}}"
 )
 
 // PackageType defines the file format of the package (e.g. zip, rpm, etc).
@@ -329,10 +329,8 @@ func (s *PackageSpec) ExtraVar(key, value string) {
 
 // Expand expands a templated string using data from the spec.
 func (s PackageSpec) Expand(in string, args ...map[string]interface{}) (string, error) {
-	// Assign a default value for variant since it's not always passed in
 	return expandTemplate("inline", in, FuncMap,
-
-		EnvMap(append([]map[string]interface{}{s.evalContext, {"Variant": ""}, s.toMap()}, args...)...))
+		EnvMap(append([]map[string]interface{}{s.evalContext, s.toMap()}, args...)...))
 }
 
 // MustExpand expands a templated string using data from the spec. It panics if