ci: Don't install pycparser and idna seperately

AFAICT no longer necessary. These install fine as part of requirements.txt.

.ci/ansible_install.py

@@ -4,10 +4,6 @@ import ci_lib
 
 batches = [
     [
-        # Must be installed separately, as PyNACL indirect requirement causes
-        # newer version to be installed if done in a single pip run.
-        # Separately install ansible based on version passed in from azure-pipelines.yml or .travis.yml
-        'pip install "pycparser<2.19" "idna<2.7"',
         'pip install '
             '-r tests/requirements.txt '
             '-r tests/ansible/requirements.txt',

.ci/debops_common_install.py

@@ -7,9 +7,6 @@ ci_lib.DISTROS = ['debian']
 
 ci_lib.run_batches([
     [
-        # Must be installed separately, as PyNACL indirect requirement causes
-        # newer version to be installed if done in a single pip run.
-        'pip install "pycparser<2.19"',
         'pip install -qqq "debops[ansible]==2.1.2" "ansible-base<2.10.14" "ansible=={}"'.format(ci_lib.ANSIBLE_VERSION),
     ],
     [

.ci/localhost_ansible_install.py

@@ -4,11 +4,6 @@ import ci_lib
 
 batches = [
     [
-        # Must be installed separately, as PyNACL indirect requirement causes
-        # newer version to be installed if done in a single pip run.
-        # Separately install ansible based on version passed in from azure-pipelines.yml or .travis.yml
-        # Don't set -U as that will upgrade Paramiko to a non-2.6 compatible version.
-        'pip install "pycparser<2.19" "idna<2.7" virtualenv',
         'pip install '
             '-r tests/requirements.txt '
             '-r tests/ansible/requirements.txt',

.ci/mitogen_install.py

@@ -4,7 +4,6 @@ import ci_lib
 
 batches = [
     [
-        'pip install "pycparser<2.19" "idna<2.7"',
         'pip install -r tests/requirements.txt',
     ]
 ]

tests/requirements.txt

@@ -16,3 +16,4 @@ urllib3[secure]==1.23; python_version < '2.7'
 urllib3[secure]==1.26; python_version > '2.6' and python_version < '2.7.9'
 # Last idna compatible with Python 2.6 was idna 2.7.
 idna==2.7; python_version < '2.7'
+virtualenv==20.10.0