Clean up some dead code in check nesting

Author: xzyfer

src/check_nesting.cpp

@@ -2,14 +2,11 @@
 #include <vector>
 
 #include "check_nesting.hpp"
-#include "context.hpp"
-// #include "debugger.hpp"
 
 namespace Sass {
 
-  CheckNesting::CheckNesting(Context& ctx)
-  : ctx(ctx),
-    parent_stack(std::vector<AST_Node*>())
+  CheckNesting::CheckNesting()
+  : parent_stack(std::vector<AST_Node*>())
   { }
 
   AST_Node* CheckNesting::parent()

src/check_nesting.hpp

@@ -2,7 +2,6 @@
 #define SASS_CHECK_NESTING_H
 
 #include "ast.hpp"
-#include "context.hpp"
 #include "operation.hpp"
 
 namespace Sass {
@@ -11,16 +10,14 @@ namespace Sass {
 
   class CheckNesting : public Operation_CRTP<Statement*, CheckNesting> {
 
-    Context&                 ctx;
-    std::vector<Block*>      block_stack;
     std::vector<AST_Node*>   parent_stack;
 
     AST_Node* parent();
 
     Statement* fallback_impl(AST_Node* n);
 
   public:
-    CheckNesting(Context&);
+    CheckNesting();
     ~CheckNesting() { }
 
     Statement* operator()(Block*);

src/context.cpp

@@ -649,7 +649,7 @@ namespace Sass {
     // create crtp visitor objects
     Expand expand(*this, &global, &backtrace);
     Cssize cssize(*this, &backtrace);
-    CheckNesting check_nesting(*this);
+    CheckNesting check_nesting;
     // check nesting
     root = root->perform(&check_nesting)->block();
     // expand and eval the tree