Remove #[] method from Transliterator::Base instances

lib/transliterator/base.rb

@@ -61,10 +61,6 @@ def initialize
       end
     end
 
-    def [](codepoint)
-      approximations[codepoint] || codepoint
-    end
-
     # Transliterate a given string's UTF-8 characters to their ASCII equivalants.
     #
     #     transliterator = Transliterator::Base.instance
@@ -73,7 +69,7 @@ def [](codepoint)
     # @return [String] The transliterated string
     def transliterate(string)
       string.unpack("U*")
-            .map { |char| self[char] }
+            .map { |codepoint| approximations[codepoint] || codepoint }
             .flatten
             .pack("U*")
     end

spec/transliterator/base_spec.rb

@@ -24,16 +24,6 @@
     end
   end
 
-  describe '#[]' do
-    it 'returns the approximation for the given codepoint' do
-      subject[215].should == 120
-    end
-
-    it 'returns the codepoint if an approximation is not found' do
-      subject[97].should == 97
-    end
-  end
-
   describe '#transliterate' do
     it 'transliterates math related characters' do
       subject.transliterate("5 × 10 ÷ 2 ‐ 5 = 20").should == '5 x 10 / 2 - 5 = 20'