Delete debugging puts statement from spec

Fixes the "rspec output includes an HTML page dump" issue noted at
https://github.com/Growstuff/growstuff/commit/2089866756f8c42c8c582f33ceccbeb0585df141#diff-6464240396bc745d7e89a408c200fd3aR15

spec/features/gardens_spec.rb

@@ -12,7 +12,6 @@ feature "Planting a crop", js: true do
 
   scenario "View gardens" do
     visit gardens_path
-    puts page.body
     expect(page).to have_content "Everyone's gardens"
     click_link "View your gardens"
     expect(page).to have_content "#{garden.owner.login_name}'s gardens"