remove diff method

lib/licensee.rb

@@ -40,11 +40,6 @@ class Licensee
       Licensee::Project.new(path).license
     end
 
-    # Diffs the project license and the known license
-    def diff(path)
-      Licensee::Project.new(path).license_file.diff
-    end
-
     # Array of matchers to use, in order of preference
     # The order should be decending order of anticipated speed to match
     def matchers

test/test_licensee.rb

@@ -12,10 +12,6 @@ class TestLicensee < Minitest::Test
     assert_equal "mit", Licensee.license(fixture_path("licenses.git")).key
   end
 
-  should "diff a license" do
-    Licensee.diff(fixture_path("licenses.git"))
-  end
-
   context "confidence threshold" do
     should "return the confidence threshold" do
       assert_equal 90, Licensee.confidence_threshold

test/test_licensee_project_file.rb

@@ -21,12 +21,7 @@ class TestLicenseeProjectFile < Minitest::Test
   should "know the path" do
     assert_equal "LICENSE", @file.path
   end
-
-  should "diff the file" do
-    expected = "-Copyright (c) [year] [fullname]\n+Copyright (c) 2014 Ben Balter"
-    assert @file.diff.include?(expected)
-  end
-
+  
   should "calculate confidence" do
     assert_equal 100, @file.confidence
   end