remove reduplicate test and remove useless variable

lib/brakeman/tracker.rb

@@ -149,7 +149,7 @@ class Brakeman::Tracker
 
   #Returns a Report with this Tracker's information
   def report
-    report = Brakeman::Report.new(@app_tree, self)
+    Brakeman::Report.new(@app_tree, self)
   end
 
   def index_call_sites

test/tests/test_brakeman.rb

@@ -98,14 +98,6 @@ class ConfigTests < Test::Unit::TestCase
     assert_nil final_options[:quiet]
   end
   
-  def test_output_format_with_default
-    options = {}
-    
-    output_format = Brakeman.get_output_formats(options)
-    
-    assert_equal [:to_s], output_format
-  end
-  
   def output_format_tester options, expected_options
     output_formats = Brakeman.get_output_formats(options)