removed unnecesary files

spec/models/content_spec.rb

-require 'spec_helper'
-
-describe Content do
-  before :each do
-    @text =
-"""
-hi @tom, I have a question from @pi314 about the following code:
-```
-class A
-  def set_some_variable
-    @some_variable = 1
-  end
-end
-```
-and also the following code
-    class A
-      def get_some_variable
-        @some_variable
-      end
-    end
-what is the 'at' symbol doing there? @dementrock
-"""
-    User.delete_all
-    User.create!(external_id: "1", username: "tom", email: "tom@test.com")
-    User.create!(external_id: "2", username: "pi314", email: "pi314@test.com")
-  end
-
-  describe "#get_marked_text(text)" do
-    it "returns marked at text" do
-      converted = Content.get_marked_text(@text)
-      converted.should include "@tom_0"
-      converted.should include "@pi314_1"
-      converted.should include "@some_variable_2"
-      converted.should include "@some_variable_3"
-      converted.should include "@dementrock_4"
-    end
-  end
-
-  describe "#get_valid_at_position_list(text)" do
-    it "returns the list of positions for the valid @ notifications, filtering out the ones in code blocks" do
-      list = Content.get_valid_at_position_list(@text)
-      list.should include({ position: 0, username: "tom", user_id: "1" })
-      list.should include({ position: 1, username: "pi314", user_id: "2" })
-      list.length.should == 2
-    end
-  end
-end