Remove duplicated shared examples

spec/support/shared_examples/services/common_system_notes_examples.rb

-shared_examples 'system note creation' do |update_params, note_text|
-  subject { described_class.new(project, user).execute(issuable, [])}
-
-  before do
-    issuable.assign_attributes(update_params)
-    issuable.save
-  end
-
-  it 'creates 1 system note with the correct content' do
-    expect { subject }.to change { Note.count }.from(0).to(1)
-
-    note = Note.last
-    expect(note.note).to match(note_text)
-    expect(note.noteable_type).to eq(issuable.class.name)
-  end
-end
-
-shared_examples 'WIP notes creation' do |wip_action|
-  subject { described_class.new(project, user).execute(issuable, []) }
-
-  it 'creates WIP toggle and title change notes' do
-    expect { subject }.to change { Note.count }.from(0).to(2)
-
-    expect(Note.first.note).to match("#{wip_action} as a **Work In Progress**")
-    expect(Note.second.note).to match('changed title')
-  end
-end