Remove duplicated attribute alias resolution in `_select!`

This is also resolved in `arel_column`.

activerecord/lib/active_record/relation/query_methods.rb

@@ -232,9 +232,6 @@ def select(*fields)
 
     def _select!(*fields) # :nodoc:
       fields.flatten!
-      fields.map! do |field|
-        klass.attribute_alias?(field) ? klass.attribute_alias(field).to_sym : field
-      end
       self.select_values += fields
       self
     end
@@ -1054,9 +1051,9 @@ def arel_columns(columns)
           case field
           when Symbol
             field = field.to_s
-            arel_column(field) { connection.quote_table_name(field) }
+            arel_column(field, &connection.method(:quote_table_name))
           when String
-            arel_column(field) { field }
+            arel_column(field, &:itself)
           when Proc
             field.call
           else
@@ -1072,7 +1069,7 @@ def arel_column(field)
         if klass.columns_hash.key?(field) && (!from || table_name_matches?(from))
           arel_attribute(field)
         else
-          yield
+          yield field
         end
       end