Create general spec for async behavior

spec/integrations/async_line_or_beginning_spec.rb

@@ -1,27 +0,0 @@
-describe 'using up-line-or-beginning-search when async is enabled' do
-  let(:options) { ["ZSH_AUTOSUGGEST_USE_ASYNC="] }
-  let(:before_sourcing) do
-    -> do
-      session.
-        run_command('autoload -U up-line-or-beginning-search').
-        run_command('zle -N up-line-or-beginning-search').
-        send_string('bindkey "').
-        send_keys('C-v').send_keys('up').
-        send_string('" up-line-or-beginning-search').
-        send_keys('enter')
-    end
-  end
-
-  it 'should show previous history entries' do
-    with_history(
-      'echo foo',
-      'echo bar',
-      'echo baz'
-    ) do
-      session.clear_screen
-      3.times { session.send_keys('up') }
-      wait_for { session.content }.to eq("echo foo")
-    end
-  end
-end
-