Revert "Add support of aliases for Method"

This reverts commits:

  905bab4d7c

  be626cfada

The problem is that Travis CI does not like tests for some reason.

Signed-off-by: Kyrylo Silin <kyrylosilin@gmail.com>

lib/pry/commands/stat.rb

@@ -16,13 +16,10 @@ class Pry
 
     def process
       meth = method_object
-      aliases = meth.aliases
-
       output.puts unindent <<-EOS
         Method Information:
         --
         Name: #{meth.name}
-        Alias#{ "es" if aliases.length > 1 }: #{ aliases.any? ? aliases.join(", ") : "None." }
         Owner: #{meth.owner ? meth.owner : "Unknown"}
         Visibility: #{meth.visibility}
         Type: #{meth.is_a?(::Method) ? "Bound" : "Unbound"}

lib/pry/method.rb

@@ -403,24 +403,6 @@ class Pry
       source_file == Pry.eval_path
     end
 
-    # @return [Array<String>] All known aliases for the method.
-    # @note On Ruby 1.8 this method always returns an empty Array for methods
-    #   implemented in C.
-    def aliases
-      owner = @method.owner
-      # Avoid using `to_sym` on {Method#name}, which returns a `String`, because
-      # it won't be garbage collected.
-      name = @method.name
-
-      alias_list = owner.instance_methods.combination(2).select do |pair|
-        owner.instance_method(pair.first) == owner.instance_method(pair.last) &&
-          pair.include?(name)
-      end.flatten
-      alias_list.delete(name)
-
-      alias_list.map(&:to_s)
-    end
-
     # @return [Boolean] Is the method definitely an alias?
     def alias?
       name != original_name

test/test_method.rb

@@ -1,5 +1,4 @@
 require 'helper'
-require 'set'
 
 describe Pry::Method do
   it "should use String names for compatibility" do
@@ -398,48 +397,5 @@ describe Pry::Method do
       meth.send(:method_name_from_first_line, "def obj_name.x").should == "x"
     end
   end
-
-  describe 'method aliases' do
-    before do
-      @class = Class.new {
-        def eat
-        end
-
-        alias fress eat
-        alias_method :omnomnom, :fress
-
-        def eruct
-        end
-      }
-    end
-
-    it 'should be able to find method aliases' do
-      meth = Pry::Method(@class.new.method(:eat))
-      aliases = Set.new(meth.aliases)
-
-      aliases.should == Set.new(["fress", "omnomnom"])
-    end
-
-    it 'should return an empty Array if cannot find aliases' do
-      meth = Pry::Method(@class.new.method(:eruct))
-      meth.aliases.should.be.empty
-    end
-
-    it 'should not include the own name in the list of aliases' do
-      meth = Pry::Method(@class.new.method(:eat))
-      meth.aliases.should.not.include "eat"
-    end
-
-    unless Pry::Helpers::BaseHelpers.mri_18?
-      # Ruby 1.8 doesn't support this feature.
-      it 'should be able to find aliases for methods implemented in C' do
-        meth = Pry::Method(Hash.new.method(:key?))
-        aliases = Set.new(meth.aliases)
-
-        aliases.should == Set.new(["include?", "member?", "has_key?"])
-      end
-    end
-
-  end
 end