Merge pull request swiftlang#34050 from apple/shahmishal/update-checkout-rebranch-remove

Author: swift-ci

utils/update_checkout/update-checkout-config.json

@@ -306,33 +306,6 @@
                 "sourcekit-lsp": "release/5.3",
                 "swift-format": "main"
             }
-        },
-       "master-rebranch": {
-            "aliases": ["master-rebranch", "swift/master-rebranch"],
-            "repos": {
-                "llvm-project": "swift/master-rebranch",
-                "swift": "master-rebranch",
-                "cmark": "main",
-                "llbuild": "main",
-                "swift-tools-support-core": "main",
-                "swiftpm": "main",
-                "swift-argument-parser": "0.3.0",
-                "swift-driver": "main",
-                "swift-syntax": "main",
-                "swift-stress-tester": "main",
-                "swift-corelibs-xctest": "main",
-                "swift-corelibs-foundation": "main",
-                "swift-corelibs-libdispatch": "main",
-                "swift-integration-tests": "main",
-                "swift-xcode-playground-support": "main",
-                "ninja": "release",
-                "icu": "release-65-1",
-                "yams": "3.0.1",
-                "cmake": "v3.16.5",
-                "indexstore-db": "main",
-                "sourcekit-lsp": "main",
-                "swift-format": "main"
-            }
         }
     }
 }