MDL-57281 behat: Fix some goutte tests (cannot click on li)

Simply they are not needed, without JS everything is expanded.

mod/chat/tests/behat/chat_calendar_events.feature

@@ -25,7 +25,6 @@ Feature: Chat calendar entries
     And I am on "Course 1" course homepage with editing mode on
    # TODO MDL-57120 site "Calendar" link not accessible without navigation block.
     And I add the "Navigation" block if not present
-    And I click on "Site pages" "list_item" in the "Navigation" "block"
     Given I click on "Calendar" "link" in the "Navigation" "block"
     Then I should not see "Test chat name"
 
@@ -37,6 +36,5 @@ Feature: Chat calendar entries
     And I am on "Course 1" course homepage with editing mode on
    # TODO MDL-57120 site "Calendar" link not accessible without navigation block.
     And I add the "Navigation" block if not present
-    And I click on "Site pages" "list_item" in the "Navigation" "block"
     Given I click on "Calendar" "link" in the "Navigation" "block"
     Then I should see "Test chat name"

tag/tests/behat/edit_tag.feature

@@ -94,7 +94,6 @@ Feature: Users can edit tags to add description or rename
     And I press "Customise this page"
       # TODO MDL-57120 site "Tags" link not accessible without navigation block.
     And I add the "Navigation" block if not present
-    And I click on "Site pages" "list_item" in the "Navigation" "block"
     And I click on "Tags" "link" in the "Navigation" "block"
     And I follow "Turtle"
     And I follow "User 1"

tag/tests/behat/tagindex.feature

@@ -25,7 +25,6 @@ Feature: Browsing tagged items
     And I press "Customise this page"
     # TODO MDL-57120 "Tags" link not accessible without navigation block.
     And I add the "Navigation" block if not present
-    And I click on "Site pages" "list_item" in the "Navigation" "block"
     And I click on "Tags" "link" in the "Navigation" "block"
     And I follow "Cat"
     Then I should see "Courses" in the ".tag-index-items h3" "css_element"