Resolve typed credentials safely

internal/config/validate_helpers.go

@@ -10,7 +10,6 @@ import (
 )
 
 var windowsAbsPathRE = regexp.MustCompile(`^[A-Za-z]:[\\/].*`)
-var envVarNameRE = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)
 
 func sortedStringKeys[V any](values map[string]V) []string {
 	keys := make([]string, 0, len(values))
@@ -21,17 +20,6 @@ func sortedStringKeys[V any](values map[string]V) []string {
 	return keys
 }
 
-func validateEnvVarNameField(fieldName, value string) error {
-	trimmed := strings.TrimSpace(value)
-	if trimmed == "" {
-		return fmt.Errorf("%s must be non-empty", fieldName)
-	}
-	if !envVarNameRE.MatchString(trimmed) {
-		return fmt.Errorf("%s must be a valid environment variable name", fieldName)
-	}
-	return nil
-}
-
 func validateRelativeSafePath(fieldName, value string) error {
 	trimmed := strings.TrimSpace(value)
 	if trimmed == "" {