ci: no special handing for windows package name

windows packages for 5.0.0 and 5.0.1 were release using long package
name (with otp version).
but we have manually made a copy of the package to default (short) name
and uploaded to s3.
going forward, windows packages will only release on default (short)
names because we never support relup for windows

scripts/relup-build/download-base-packages.sh

@@ -27,9 +27,13 @@ case $PROFILE in
         ;;
 esac
 
-UNAME="$(uname -s)"
-case "$UNAME" in
-    Darwin)
+SYSTEM="$(./scripts/get-distro.sh)"
+case "$SYSTEM" in
+    windows*)
+        echo "NOTE: no_relup_for_windows"
+        exit 0
+        ;;
+    macos*)
         SHASUM="shasum -a 256"
         ;;
     *)