config.toml: Update for pagination change

Theme is using Hugo's native pagination, so we can rely on the site
variable "Paginate" instead of managing our own.

config.toml

@@ -5,6 +5,8 @@ languageCode = "en-us"
 title = "Picturing Jordan"
 theme = "hugo-theme-bootstrap4-blog"
 enableRobotsTXT = true
+# number of posts to show on home/category/tag pages (Default: 10)
+paginate = 3
 
 [permalinks]
   post = "/:year/:month/:slug/"
@@ -17,9 +19,6 @@ enableRobotsTXT = true
   # Description/subtitle for homepage (can be Markdown)
   description = "Sharing Jordan with the world — one picture at a time."
 
-  # How many posts to show on the homepage (Default: 5)
-  num_recent_posts = 3
-
   # Format dates with Go's time formatting
   date_format = "Mon Jan 02, 2006"