Don't install csrgen extra dependencies

See: https://pagure.io/freeipa/issue/8669
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

tox.ini

@@ -13,7 +13,7 @@ changedir={envdir}
 setenv=
     HOME={envtmpdir}
 deps=
-    ipaclient[csrgen]
+    ipaclient
     ipatests
 commands=
     {envbindir}/ipa --help
@@ -22,7 +22,7 @@ commands=
 [testenv:pylint3]
 basepython=python3
 deps=
-    ipaclient[csrgen,otptoken_yubikey,ldap]
+    ipaclient[otptoken_yubikey,ldap]
     pylint
 commands=
     {envpython} -m pylint \