diff --git a/misc/core.func b/misc/core.func
index c1fbcbaa..ea549bf9 100644
--- a/misc/core.func
+++ b/misc/core.func
@@ -294,14 +294,6 @@ __curl_err_handler() {
   exit 1
 }
 
-detect_os() {
-  case "$PCT_OSTYPE" in
-  alpine) CORE_OS="alpine" ;;
-  debian | ubuntu) CORE_OS="debian" ;;
-  *) CORE_OS="unknown" ;;
-  esac
-}
-
 fatal() {
   msg_error "$1"
   kill -INT $$