Merge pull request swiftlang#206 from tkremenek/SwiftGraph-4.0

Dropping building SwiftGraph in 3.0 mode.

Author: Zachary 'Clack' Cole

Diff for: projects.json

@@ -2163,12 +2163,8 @@
     "maintainer": "[email protected]",
     "compatibility": [
       {
-        "version": "3.1",
-        "commit": "07b088eef5cb883e5544ea4d2e9a1338318f0596"
-      },
-      {
-        "version": "4.0.3",
-        "commit": "639e382b21975d900afadbcfaf02ff50c90409b7"
+        "version": "4.0",
+        "commit": "6c8c5d699db17f3726776656a09f058bb29d76ec"
       }
     ],
     "platforms": [