Remove more 1.9 related workarounds

lib/pry/code.rb

@@ -346,14 +346,6 @@ class Pry
       ''.respond_to?(method_name, include_private) || super
     end
 
-    if RUBY_VERSION.start_with?('1.9')
-      # @todo This is needed for Ruby 1.9 support where `lines` return an
-      #   Enumerator. Newer Rubies return an Array
-      def lines
-        super.to_a
-      end
-    end
-
     protected
 
     # An abstraction of the `dup.instance_eval` pattern used throughout this

lib/pry/wrapped_module.rb

@@ -246,12 +246,7 @@ class Pry
       method_candidates.count
     end
 
-    # @note On JRuby 1.9 and higher, in certain conditions, this method chucks
-    #   away its ability to be quick (when there are lots of monkey patches,
-    #   like in Rails). However, it should be efficient enough on other rubies.
-    # @see https://github.com/jruby/jruby/issues/525
-    # @return [Enumerator, Array] on JRuby 1.9 and higher returns Array, on
-    #  other rubies returns Enumerator
+    # @return [Array]
     def candidates
       enum = Enumerator.new do |y|
         (0...number_of_candidates).each do |num|

spec/exception_handler_spec.rb

@@ -47,7 +47,7 @@ RSpec.describe Pry::ExceptionHandler do
       end
 
       before do
-        if RUBY_VERSION.start_with?('1.9', '2.0')
+        if RUBY_VERSION.start_with?('2.0')
           skip("Ruby #{RUBY_VERSION} doesn't support nested exceptions")
         end
       end

spec/integration/hanami_spec.rb

@@ -10,9 +10,6 @@ RSpec.describe "Hanami integration" do
   end
 
   it "does not enter an infinite loop (#1471, #1621)" do
-    if RUBY_VERSION.start_with? "1.9"
-      skip "prepend is not supported on this version of Ruby"
-    end
     code = <<-RUBY
         require "pry"
         require "timeout"