Remove simplecov gem on 1.8

Deprecation note indicates it will be removing even
no-op support for 1.8, so clarify now that it won’t
even be installed on those builds.

Gemfile

@@ -2,7 +2,7 @@ require File.expand_path('on_what', File.dirname(__FILE__))
 source 'https://rubygems.org'
 
 # Travis-only dependencies go here
-if on_travis?
+if on_travis? && !on_1_8?
   group :test do
     gem 'codecov', :require => false
   end

spec/spec_helper.rb

@@ -1,5 +1,7 @@
 require File.expand_path('on_what', File.dirname(File.dirname(__FILE__)))
 
+# Code coverage (via SimpleCov) on Ruby 1.9+
+unless on_1_8?
   begin
     require 'simplecov'
     SimpleCov.start do
@@ -7,18 +9,19 @@ begin
       add_filter '/vendor/'  # exclude gems which are vendored on Travis CI
     end
 
-  # On CI, for Ruby 1.9+, we publish simplecov results to codecov.io
-  if on_travis? && !on_1_8?
+    # On CI we publish simplecov results to codecov.io
+    if on_travis?
       require 'codecov'
       SimpleCov.formatter = SimpleCov::Formatter::Codecov
     end
 
-  # Due to circular dependency (simplecov depends on docile), remove and require again below
+    # Due to circular dependency (simplecov depends on docile), remove docile and require again below
     Object.send(:remove_const, :Docile)
     $LOADED_FEATURES.reject! { |f| f =~ /\/docile\// }
   rescue LoadError
     warn 'warning: simplecov or codecov gems not found; skipping coverage'
   end
+end
 
 lib_dir = File.join(File.dirname(File.dirname(__FILE__)), 'lib')
 $LOAD_PATH.unshift lib_dir unless $LOAD_PATH.include? lib_dir