try fix freezing issue

git-svn-id: https://dev.finn.de/svn/cockpit/branches/reporting_merge@1171 7926756e-e54e-46e6-9721-ed318f58905e

app/models/cost_query/sql_statement.rb

@@ -49,7 +49,6 @@ class CostQuery::SqlStatement
   # @return [CostQuery::SqlStatement] Generated statement
   def self.unified_entry(model)
     table = table_name_for model
-    Rails.cache.fetch("unified_#{table}") do
     new(table).tap do |query|
       query.select COMMON_FIELDS
       query.select({
@@ -59,7 +58,6 @@ class CostQuery::SqlStatement
       send("unify_#{table}", query)
     end
   end
-  end
 
   ##
   # Applies logic for mapping time entries to general entries structure.