chore: Remove unsupported versions (#702)

Author: Oliver Weiler

src/main/scala/io/sdkman/changelogs/JExtractMigrations.scala

@@ -58,4 +58,18 @@ class JExtractMigrations {
       websiteUrl = "https://jdk.java.net/jextract/"
     ).insert()
   }
+
+  @ChangeSet(
+    order = "004",
+    id = "004_remove_unsupported_versions",
+    author = "helpermethod"
+  )
+  def migration004(implicit db: MongoDatabase): Unit = {
+    List("21-jextract+1-2", "20-jextract+1-2", "19-jextract+2-3")
+      .foreach { version =>
+        List(Linux64, MacARM64, MacOSX, Windows).foreach { platform =>
+          removeVersion("jextract", version, platform)
+        }
+      }
+  }
 }