Cleanup older upgrade files (#1698)

sonata-project · Jun 5, 2023 · 489e2fa · 489e2fa
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commit 489e2fa
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diff --git a/UPGRADE-3.x.md b/UPGRADE-3.x.md
diff --git a/UPGRADE-4.x.md b/UPGRADE-4.x.md
@@ -0,0 +1,2 @@
+UPGRADE 4.x
+===========