Deleting unused crazyfun tasks and rules, we don't use it to build .N…

…et binding anymore, it should be built with .Net Code that crazyfun has no support for.

Rakefile

@@ -31,7 +31,6 @@ require 'rake-tasks/crazy_fun/mappings/visualstudio'
 # The original build rules
 require 'rake-tasks/task-gen'
 require 'rake-tasks/checks'
-require 'rake-tasks/dotnet'
 require 'rake-tasks/c'
 require 'rake-tasks/selenium'
 require 'rake-tasks/se-ide'
@@ -288,14 +287,7 @@ task :test_rb_remote => [
 
 task :test_py => [ :py_prep_for_install_release, "//py:marionette_test:run" ]
 
-task :test_dotnet => [
-  "//dotnet/test:firefox:run"
-]
-
 task :test => [ :test_javascript, :test_java, :test_rb ]
-if (msbuild_installed?)
-  task :test => [ :test_dotnet ]
-end
 if (python?)
   task :test => [ :test_py ]
 end
@@ -310,8 +302,6 @@ task :clean do
   rm_rf 'dist/'
 end
 
-task :dotnet => [ "//dotnet", "//dotnet:support", "//dotnet:core", "//dotnet:webdriverbackedselenium" ]
-
 # Generate a C++ Header file for mapping between magic numbers and #defines
 # in the C++ code.
 ie_generate_type_mapping(:name => "ie_result_type_cpp",