Remove again pika/markdown from top level Pipfile

The theory:
* 55b31b0 *really* fixes the issue that dependencies from the packages did not end up in the top level Pipfile.lock
* the Pipfile.lock *is* the ground truth currently for our python3-modules
* therefore, we should be able to reliable remove both package dependencies again from the Pipfile, they stay in the Pipfile.lock after locking
* however, we soon need to finish the transition to plain venv from bazel

Change-Id: Ic62034fd6bedd21c93e61d52872a4e6f48bfb046
JIRA-Ref: CMK-19819

Pipfile

@@ -90,8 +90,6 @@ uvicorn = "*"
 webtest = "*"  # used by WSGI based tests
 
 [packages]
-markdown = "*"  # Should be in cmk-werks, see CMK-19819
-pika = "*"  # Should be in cmk-messaging, see CMK-19819
 setuptools = "<=70.3.0"  # See https://github.com/pypa/setuptools/issues/4487#issuecomment-2237487845 for context
 setuptools-scm = "==4.1.2"  # needed by various setup.py
 six = "==1.16.0"  # direct dependency + needed by python-dateutil, vcrpy, python-active-directory