Remove references to deprecated gitcdn.link

Related feedback: - uBlockOrigin/uBlock-issues#2136 (comment)

Author: gorhill

assets/assets.json

@@ -9,7 +9,6 @@
 "cdnURLs": [
 "https://ublockorigin.github.io/uAssetsCDN/ublock/assets.json",
 "https://ublockorigin.pages.dev/ublock/assets.json",
-"https://gitcdn.link/cdn/gorhill/uBlock/master/assets/assets.json",
 "https://cdn.jsdelivr.net/gh/gorhill/uBlock@master/assets/assets.json",
 "https://cdn.statically.io/gh/gorhill/uBlock/master/assets/assets.json"
 ]
@@ -19,7 +18,6 @@
 "updateAfter": 19,
 "contentURL": [
 "https://publicsuffix.org/list/public_suffix_list.dat",
-"https://gitcdn.link/cdn/publicsuffix/list/master/public_suffix_list.dat",
 "assets/thirdparties/publicsuffix.org/list/effective_tld_names.dat"
 ]
 },