scalafmt fix

Author: SethTisue

configs/community.dbuild

@@ -1090,7 +1090,13 @@ build += {
   ${vars.base} {
      name: "scalafmt"
      uri: ${vars.uris.scalafmt-uri}
-     extra.exclude: ["intellij"]
+     extra.exclude: [
+       // our artifactory doesn't have sbt-idea-plugin; we could add it,
+       // but this subproject seems inessential/irrelevant actually
+       "intellij"
+       // uses coursier (as a library, I think)
+       "bootstrap"
+     ]
   }
 
   ${vars.base} {