Turn off BugBug for the Web Compatibility product (#2104)

It was already disabled on all existing components. However, we recently
added another component called "Knowledge Base", where we also do not
want to get nagged, as some flags depend on internal processes.

Instead of adding another Component-exception, let's turn it off for the
entire product.

configs/rules.json

@@ -50,7 +50,6 @@
       "Remote Protocol",
       "Testing",
       "Toolkit",
-      "Web Compatibility",
       "WebExtensions"
     ],
     "log": "/tmp/bugbot_errors.txt",
@@ -271,11 +270,7 @@
       "Core::MFBT",
       "WebExtensions::Developer Outreach",
       "NSS::Tools",
-      "NSS::Build",
-      "Web Compatibility::Desktop",
-      "Web Compatibility::Interventions",
-      "Web Compatibility::Mobile",
-      "Web Compatibility::Tooling & Investigations"
+      "NSS::Build"
     ],
     "supervisor_skiplist": ["dcamp@mozilla.com"]
   },