Update apple.json

AFAIK, Apple does not provide commercial support contract for the swift language

apple.json

@@ -12,7 +12,7 @@
                 "category_list": ["Developer"],
                 "source_code_download": "https://github.com/apple/swift/archive/master.zip",
                   "source_code_profile": "https://www.openhub.net/p/swift-lang/analyses/latest/languages_summary",
-                "commercial_support": "https://swift.org/",
+                "commercial_support": "",
                 "wikipedia_url": "https://en.wikipedia.org/wiki/Swift_(programming_language)",
                 "success_case_list": []
         }]