remove save_data and load_data dsl

Author: flyerhzm

Diff for: README.md

@@ -78,8 +78,6 @@ DSLs are as follows
 * [add_snippet](https://synvert-hq.github.io/synvert-core-ruby/Synvert/Core/Rewriter.html#add_snippet-instance_method) - call another rewriter
 * [call_helper](https://synvert-hq.github.io/synvert-core-ruby/Synvert/Core/Rewriter.html#call_helper-instance_method) - call a shared rewriter
 * [with_configurations](https://synvert-hq.github.io/synvert-core-ruby/Synvert/Core/Rewriter.html#with_configurations-instance_method) - execute a block of code with temporary configurations
-* [save_data](https://synvert-hq.github.io/synvert-core-ruby/Synvert/Core/Rewriter.html#save_data-instance_method) - save data
-* [load_data](https://synvert-hq.github.io/synvert-core-ruby/Synvert/Core/Rewriter.html#load_data-instance_method) - load data
 
 Scopes:
 

Diff for: lib/synvert/core/rewriter.rb

@@ -416,22 +416,6 @@ def with_configurations(configurations, &block)
       Configuration.with_temporary_configurations(configurations, &block)
     end
 
-    # Saves data with a given key and value.
-    #
-    # @param key [Symbol] the key to identify the data
-    # @param value [Object] the value to be saved
-    def save_data(key, value)
-      Synvert::Core.instance_variable_set("@#{key}", value)
-    end
-
-    # Loads data with the given key.
-    #
-    # @param key [Symbol] the key of the data to be loaded
-    # @return [Object] the data loaded
-    def load_data(key)
-      Synvert::Core.instance_variable_get("@#{key}")
-    end
-
     private
 
     # Handle one file.

Diff for: spec/synvert/core/rewriter_spec.rb

@@ -395,18 +395,6 @@ module Synvert::Core
       expect(instance.dynamic_helper('arg1', 'arg2')).to eq 'dynamic result'
     end
 
-    it 'parses save_data and load_data' do
-      data = nil
-      rewriter =
-        Rewriter.new 'group', 'name' do
-          hash = { foo: 'bar' }
-          save_data :object, hash
-          data = load_data :object
-        end
-      rewriter.process
-      expect(data).to eq({ foo: 'bar' })
-    end
-
     describe 'class methods' do
       before :each do
         Rewriter.clear