re-enable Kickstarter-ReactiveExtensions

It passes in release mode

Author: eeckstein

projects.json

@@ -497,72 +497,28 @@
         "project": "ReactiveExtensions.xcodeproj",
         "scheme": "ReactiveExtensions-iOS",
         "destination": "generic/platform=iOS",
-        "configuration": "Release",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "<rdar://problem/30788078>",
-                "swift-4.0-branch": "<rdar://problem/30788078>",
-                "swift-3.1-branch": "<rdar://problem/30788078>"
-              }
-            }
-          }
-        }
+        "configuration": "Release"
       },
       {
         "action": "BuildXcodeProjectScheme",
         "project": "ReactiveExtensions.xcodeproj",
         "scheme": "ReactiveExtensions-TestHelpers-iOS",
         "destination": "generic/platform=iOS",
-        "configuration": "Release",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "<rdar://problem/30788078>",
-                "swift-4.0-branch": "<rdar://problem/30788078>",
-                "swift-3.1-branch": "<rdar://problem/30788078>"
-              }
-            }
-          }
-        }
+        "configuration": "Release"
       },
       {
         "action": "BuildXcodeProjectScheme",
         "project": "ReactiveExtensions.xcodeproj",
         "scheme": "ReactiveExtensions-TestHelpers-tvOS",
         "destination": "generic/platform=tvOS",
-        "configuration": "Release",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "<rdar://problem/30788078>",
-                "swift-4.0-branch": "<rdar://problem/30788078>",
-                "swift-3.1-branch": "<rdar://problem/30788078>"
-              }
-            }
-          }
-        }
+        "configuration": "Release"
       },
       {
         "action": "BuildXcodeProjectScheme",
         "project": "ReactiveExtensions.xcodeproj",
         "scheme": "ReactiveExtensions-tvOS",
         "destination": "generic/platform=tvOS",
-        "configuration": "Release",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "<rdar://problem/30788078>",
-                "swift-4.0-branch": "<rdar://problem/30788078>",
-                "swift-3.1-branch": "<rdar://problem/30788078>"
-              }
-            }
-          }
-        }
+        "configuration": "Release"
       }
     ]
   },