Remove arbitrary limit on the Time Entry Report columns

Appears it was put in place to prevent wide reports but was actually
limiting the data, especially when putting a day in each column.

app/controllers/time_entry_reports_controller.rb

@@ -72,8 +72,7 @@ class TimeEntryReportsController < ApplicationController
       @periods = []
       # Date#at_beginning_of_ not supported in Rails 1.2.x
       date_from = @from.to_time
-      # 100 columns max
-      while date_from <= @to.to_time && @periods.length < 100
+      while date_from <= @to.to_time
         case @columns
         when 'year'
           @periods << "#{date_from.year}"