Revert "checkExternalLibraries: check current libxml2 branch"

This reverts commit 3874e6ef7d.

it's not clear when libxml2 branches reach the end of life,
so better to track the newest branches

Change-Id: I41ec3fb2aedba6705cabcc924702ae83de428070
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/186279
Tested-by: Xisco Fauli <xiscofauli@libreoffice.org>
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

bin/checkExternalLibraries.py

@@ -19,7 +19,6 @@ python_branch = ""
 openssl_branch = ""
 postgres_branch = ""
 mariadb_branch = ""
-libxml2_branch = ""
 
 libraryIds = {
     "openssl": 2,
@@ -77,10 +76,6 @@ def get_library_list(fileName):
             global mariadb_branch
             mariadb_branch = ''.join(re.findall("\d{1,2}\.\d{1,2}", libraryName)[0])
             print("MariaDB is on branch: " + str(mariadb_branch))
-        elif libraryName.startswith("libxml2"):
-            global libxml2_branch
-            libxml2_branch = ''.join(re.findall("\d{1,2}\.\d{1,2}", libraryName)[0])
-            print("Libxml2 is on branch: " + str(libxml2_branch))
         libraryList.append(libraryName.lower())
     return libraryList
 
@@ -155,12 +150,6 @@ def get_latest_version(libName):
                 latest_version = idx
                 break
 
-    elif libName == "libxml2":
-        for idx, ver in enumerate(json['items'][item]['stable_versions']):
-            if ver.startswith(libxml2_branch):
-                latest_version = idx
-                break
-
     return Version(json['items'][item]['stable_versions'][latest_version].replace("_", ".").replace("-", ".")), json['items'][item]['homepage']
 
 if __name__ == '__main__':