openadk.org: disable cgit, because of misuse by crawlers

openadk.org/config.toml

@@ -23,10 +23,6 @@ languageCode = "en-us"
     name = "Mailinglist"
     url = "https://mailman.openadk.org/mailman3/postorius/lists/dev.openadk.org/"
     weight = -80
-[[menu.main]]
-    name = "Git"
-    url = "https://cgit.openadk.org/cgi/cgit/openadk.git/"
-    weight = -70
 [[menu.main]]
     name = "Donation"
     url = "https://www.paypal.me/wbx"