{Packaging} Unpin cffi in RPM package (#31359)

Author: bebound

scripts/release/rpm/azure-cli.spec

@@ -51,9 +51,6 @@ source %{repo_path}/scripts/install_full.sh
 # Remove unused SDK version
 %{python_cmd} %{repo_path}/scripts/trim_sdk.py
 
-# cffi 1.15.0 doesn't work with RPM: https://foss.heptapod.net/pypy/cffi/-/issues/513
-%{python_cmd} -m pip install cffi==1.14.6
-
 deactivate
 
 # Fix up %{buildroot} appearing in some files...