[szurubooru] remove 'booru.foalcon.com'

DNS record of foalcon.com no longer exists

gallery_dl/extractor/szurubooru.py

@@ -79,10 +79,6 @@ class SzurubooruExtractor(booru.BooruExtractor):
 
 
 BASE_PATTERN = SzurubooruExtractor.update({
-    "foalcon": {
-        "root": "https://booru.foalcon.com",
-        "pattern": r"booru\.foalcon\.com",
-    },
     "bcbnsfw": {
         "root": "https://booru.bcbnsfw.space",
         "pattern": r"booru\.bcbnsfw\.space",
@@ -104,7 +100,7 @@ class SzurubooruTagExtractor(SzurubooruExtractor):
     directory_fmt = ("{category}", "{search_tags}")
     archive_fmt = "t_{search_tags}_{id}_{version}"
     pattern = BASE_PATTERN + r"/posts(?:/query=([^/?#]*))?"
-    example = "https://booru.foalcon.com/posts/query=TAG"
+    example = "https://booru.bcbnsfw.space/posts/query=TAG"
 
     def __init__(self, match):
         SzurubooruExtractor.__init__(self, match)
@@ -127,7 +123,7 @@ class SzurubooruPostExtractor(SzurubooruExtractor):
     subcategory = "post"
     archive_fmt = "{id}_{version}"
     pattern = BASE_PATTERN + r"/post/(\d+)"
-    example = "https://booru.foalcon.com/post/12345"
+    example = "https://booru.bcbnsfw.space/post/12345"
 
     def posts(self):
         return (self._api_request("/post/" + self.groups[-1]),)