Merge pull request swiftlang#203 from google/format-delete-open-brace-ws

Delete the OpenBraceWhitespace rule.

Author: dabelknap

Sources/SwiftFormatRules/OpenBraceWhitespace.swift

@@ -167,12 +167,6 @@ func populate(_ pipeline: Pipeline) {
       SourceFileSyntax.self
   )
 
-  pipeline.addFormatter(
-    OpenBraceWhitespace.self,
-    for:
-      TokenSyntax.self
-  )
-
   pipeline.addFormatter(
     OperatorWhitespace.self,
     for: