Remove more lettuce tests that are covered already in bok choy tests

cms/djangoapps/contentstore/features/component.feature

@@ -2,17 +2,6 @@
 Feature: CMS.Component Adding
     As a course author, I want to be able to add a wide variety of components
 
-    Scenario: I can add single step components
-       Given I am in Studio editing a new unit
-       When I add this type of single step component:
-           | Component    |
-           | Discussion   |
-           | Video        |
-       Then I see this type of single step component:
-           | Component    |
-           | Discussion   |
-           | Video        |
-
     Scenario: I can add HTML components
        Given I am in Studio editing a new unit
        When I add this type of HTML component:
@@ -71,32 +60,6 @@ Feature: CMS.Component Adding
 #           | Problem Written in LaTeX      |
 #           | Problem with Adaptive Hint in Latex  |
 
-    Scenario: I see a prompt on delete
-        Given I am in Studio editing a new unit
-        And I add a "Discussion" "single step" component
-        And I delete a component
-        Then I am shown a prompt
-
-    Scenario: I can delete Components
-        Given I am in Studio editing a new unit
-        And I add a "Discussion" "single step" component
-        And I add a "Text" "HTML" component
-        And I add a "Blank Common Problem" "Problem" component
-        And I add a "Blank Advanced Problem" "Advanced Problem" component
-        And I delete all components
-        Then I see no components
-
-    Scenario: I can duplicate a component
-        Given I am in Studio editing a new unit
-        And I add a "Blank Common Problem" "Problem" component
-        And I add a "Multiple Choice" "Problem" component
-        And I duplicate the first component
-        Then I see a Problem component with display name "Duplicate of 'Blank Common Problem'" in position "1"
-        And I reload the page
-        Then I see a Problem component with display name "Blank Common Problem" in position "0"
-        And I see a Problem component with display name "Duplicate of 'Blank Common Problem'" in position "1"
-        And I see a Problem component with display name "Multiple Choice" in position "2"
-
     Scenario: I can set the display name of a component
         Given I am in Studio editing a new unit
         When I add a "Text" "HTML" component