CI: Drop cztop and pyzmq on Windows

Author: mrkn

.github/workflows/windows.yml

@@ -47,12 +47,11 @@ jobs:
 
     - run: pip3 install -r ci/requirements.txt
 
-    - run: bundle install --jobs 4 --retry 3
+    - run: bundle install --jobs 4 --retry 3 --without cztop
 
     - name: Run tests
       env:
-        PYTHON: python3
-        ADAPTERS: cztop ffi-rzmq pyzmq
+        ADAPTERS: ffi-rzmq
       run: |
         for adapter in $ADAPTERS; do
           export IRUBY_TEST_SESSION_ADAPTER_NAME=$adapter

Gemfile

@@ -12,6 +12,6 @@ group :plot do
   gem 'rubyvis'
 end
 
-group :test do
+group :cztop do
   gem 'cztop'
 end