Remove redundant code

Author: julienrf

compiler/src/dotty/tools/dotc/typer/ImportSuggestions.scala

@@ -233,8 +233,6 @@ trait ImportSuggestions:
 
     try
       val roots = suggestionRoots
-        .filterNot(root => defn.rootImportTypes.exists(_.symbol == root.symbol))
-          // don't suggest things that are imported by default
 
       def extensionImports = pt match
         case ViewProto(argType, SelectionProto(name: TermName, _, _, _)) =>