remove unnecessary :stag accessor

* lib/erb.rb (ERB::Compiler::TrimScanner#stag): The :stag accessor
  has already been available because it is defined in parent
  Scanner class.  [Fix GH-1445]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sun Sep 25 22:48:06 2016  namusyaka  <namusyaka@gmail.com>
+
+	* lib/erb.rb (ERB::Compiler::TrimScanner#stag): The :stag accessor
+	  has already been available because it is defined in parent
+	  Scanner class.  [Fix GH-1445]
+
 Sun Sep 25 19:21:26 2016  Kazuki Tsujimoto  <kazuki@callcc.net>
 
 	* node.c (dump_array): remove duplicate header of NODE_ARRAY/

lib/erb.rb

@@ -399,7 +399,6 @@ class ERB
           @scan_line = self.method(:scan_line)
         end
       end
-      attr_accessor :stag
 
       def scan(&block)
         @stag = nil