Revert "16591 jenkins_version: New check for version of the queried J…

…enkins instance"

This reverts commit 99663b5.

There are plans to revive this in different form in the future.
See CMK-19279

Change-Id: Id1e3371dc3154d38097393945e23ff9ecde761eb

cmk/plugins/jenkins/lib/jenkins.py

@@ -107,8 +107,6 @@ def handle_request(args, sections):
 
     # labels = {}
 
-    jenkins_version = None
-
     session = requests.Session()
     session.auth = (args.user, args.password)
 
@@ -128,10 +126,6 @@ def handle_request(args, sections):
 
             return 1
 
-        # Jenkins version usually comes with every response. We need it once.
-        if jenkins_version is None:
-            jenkins_version = response.headers.get("X-Jenkins")
-
         # Things might go wrong if authentication is missing.
         if response.status_code != 200:
             sys.stderr.write("Could not fetch data from Jenkins. Details: %s\n" % response)
@@ -183,10 +177,6 @@ def handle_request(args, sections):
     #    sys.stdout.write("<<<labels:sep(0)>>>\n")
     #    sys.stdout.write("%s\n" % json.dumps(labels))
 
-    sys.stdout.write("<<<jenkins_version:sep(0)>>>\n")
-    if jenkins_version:
-        sys.stdout.write(f"{jenkins_version}\n")
-
     return 0