Remove Instagram -> Bibliogram replacement as it's discontinued (#772)

Close #761

Reference: https://cadence.moe/blog/2022-09-01-discontinuing-bibliogram

nitter.example.conf

@@ -39,7 +39,6 @@ theme = "Nitter"
 replaceTwitter = "nitter.net"
 replaceYouTube = "piped.video"
 replaceReddit = "teddit.net"
-replaceInstagram = ""
 proxyVideos = true
 hlsPlayback = false
 infiniteScroll = false

src/formatters.nim

@@ -13,7 +13,6 @@ let
   twLinkRegex = re"""<a href="https:\/\/twitter.com([^"]+)">twitter\.com(\S+)</a>"""
 
   ytRegex = re(r"([A-z.]+\.)?youtu(be\.com|\.be)", {reStudy, reIgnoreCase})
-  igRegex = re"(www\.)?instagram\.com"
 
   rdRegex = re"(?<![.b])((www|np|new|amp|old)\.)?reddit.com"
   rdShortRegex = re"(?<![.b])redd\.it\/"
@@ -70,9 +69,6 @@ proc replaceUrls*(body: string; prefs: Prefs; absolute=""): string =
     if prefs.replaceReddit in result and "/gallery/" in result:
       result = result.replace("/gallery/", "/comments/")
 
-  if prefs.replaceInstagram.len > 0 and "instagram.com" in result:
-    result = result.replace(igRegex, prefs.replaceInstagram)
-
   if absolute.len > 0 and "href" in result:
     result = result.replace("href=\"/", &"href=\"{absolute}/")
 

src/prefs_impl.nim

@@ -107,10 +107,6 @@ genPrefs:
       "Reddit -> Teddit/Libreddit"
       placeholder: "Teddit hostname"
 
-    replaceInstagram(input, ""):
-      "Instagram -> Bibliogram"
-      placeholder: "Bibliogram hostname"
-
 iterator allPrefs*(): Pref =
   for k, v in prefList:
     for pref in v: