Un-xfail Violet

swiftlang#978 fixed
the failure.

Author: rintaro

projects.json

@@ -5154,16 +5154,7 @@
      "actions": [
        {
          "action": "BuildSwiftPackage",
-         "configuration": "release",
-         "xfail": [
-          {
-            "issue": "https://github.com/swiftlang/swift/issues/75499",
-            "compatibility": ["5.3"],
-            "branch": ["main", "release/6.0", "release/6.1"],
-            "platform": "Linux",
-            "job": ["source-compat"]
-          }
-        ]
+         "configuration": "release"
        },
        {
          "action": "TestSwiftPackage"