feat(series): remove introduction types

content/blog/series/01-series-introduction/index.md

@@ -7,7 +7,6 @@ description = "This first article introduces how does series works and how to co
 tags = ["showcase", "tutorial"]
 
 [extra]
-series_page_introduction = "link"
 series_page_introduction_variables = { position = "first", foo = "FOO!!!"}
 
 +++

content/blog/series/02-series-pages-organization/index.md

@@ -7,7 +7,6 @@ description = "This second article focuses on how to organisation the pages of a
 tags = ["showcase", "tutorial"]
 
 [extra]
-series_page_introduction = "summary"
 series_page_introduction_variables = { position = "second", foo = "FOO FOO!!!"}
 
 +++

content/blog/series/03-series-cheat-sheet/index.md

@@ -7,7 +7,6 @@ description = "This last article provides an overview of series and describe all
 tags = ["showcase", "tutorial", "FAQ"]
 
 [extra]
-series_page_introduction = "custom"
 series_page_introduction_variables = { position = "third", foo = "FOO FOO FOO!!!"}
 
 +++

content/blog/series/_index.md

@@ -12,11 +12,8 @@ series = true
 quick_navigation_buttons = true
 post_listing_index_reversed = false
 
-series_page_introduction = "none"
-
 series_page_introduction_placeholders = ["$POSITION", "$FOO", "$BAR"]
-series_page_headline = "This article is the $POSITION of the series '$SERIES_HTML_LINK' ($FOO)"
-series_page_description = """
+series_page_introduction = """
 You can put whatever you want in a custom description.
 
 **All** variable are accessibles, including custom ones.