scalafixScalaBinaryVersion setting no longer needed (#547)

build.sbt

@@ -47,7 +47,6 @@ inThisBuild(Def.settings(
     (onLoad in Global).value
   },
   projectInfoVersion := (if (isSnapshot.value) "snapshot" else version.value),
-  scalafixScalaBinaryVersion := scalaBinaryVersion.value,
   versionScheme := Some(VersionScheme.SemVerSpec)))
 
 // When this is updated the set of modules in Http.allModules should also be updated

http-scalafix/README.md

@@ -12,6 +12,5 @@ The setup of the scalafix module roughly follows the example in https://github.c
  * run `set scalacOptions in ThisBuild += "-P:semanticdb:synthetics:on"` to allow access to synthetics
  * e.g. run `docs/scalafixAll MigrateToServerBuilder`
 
-*Note:* There's some weird stuff going on regarding cross-publishing. The `scalafixScalaBinaryVersion` line in build.sbt
-should fix it but if running the rule fails with a weird error, try switching to Scala 2.12 first with `++2.12.11` (or
+*Note:* There's some weird stuff going on regarding cross-publishing. If running the rule fails with a weird error, try switching to Scala 2.12 first with `++2.12.11` (or
 whatever is now the current version).