Remove duplicate tests

examples/markdown.feature

@@ -53,33 +53,6 @@ Feature: Markdown
     And the stderr should not contain "OK"
     And the stderr should contain "ERROR"
 
-  Scenario: Check a markdown file which contains a live link in verbose mode
-    Given a file named "foo.md" with:
-    """
-    [Google](https://google.com)
-    """
-    When I successfully run `liche -v foo.md`
-    Then the stderr should contain "OK"
-
-  Scenario: Check a markdown file which contains a live link in verbose mode with a long option
-    Given a file named "foo.md" with:
-    """
-    [Google](https://google.com)
-    """
-    When I successfully run `liche --verbose foo.md`
-    Then the stderr should contain "OK"
-
-  Scenario: Check a markdown file which contains live and dead links in verbose mode
-    Given a file named "foo.md" with:
-    """
-    [Google](https://google.com)
-    [The answer](https://some-say-the-answer-is-42.com)
-    """
-    When I run `liche -v foo.md`
-    Then the exit status should be 1
-    And the stderr should contain "OK"
-    And the stderr should contain "ERROR"
-
   Scenario: Check 2 markdown files
     Given a file named "foo.md" with:
     """
@@ -104,19 +77,3 @@ Feature: Markdown
     """
     When I successfully run `sh foo.sh`
     Then the stdout should contain exactly "5"
-
-  Scenario: Check a markdown file which contains a live link with timeout
-    Given a file named "foo.md" with:
-    """
-    [Google](https://google.com)
-    """
-    When I successfully run `liche --timeout 10 foo.md`
-    Then the stdout should contain exactly ""
-
-  Scenario: Set concurrency
-    Given a file named "foo.md" with:
-    """
-    [Google](https://google.com)
-    """
-    When I successfully run `liche --concurrency 10 foo.md`
-    Then the stdout should contain exactly ""