Remove GN GYP generator.

tools/gn/functions_target.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/functions.h"
 
 #include "tools/gn/config_values_generator.h"
 #include "tools/gn/err.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/target_generator.h"
 #include "tools/gn/value.h"
 #include "tools/gn/variables.h"
 
 #define DEPENDENT_CONFIG_VARS \
     "  Dependent configs: all_dependent_configs, direct_dependent_configs\n"
 #define DEPS_VARS \
     "  Deps: data, datadeps, deps, forward_dependent_configs_from, hard_dep\n"
 #define GENERAL_TARGET_VARS \
-    "  General: configs, external, source_prereqs, sources\n"
+    "  General: configs, source_prereqs, sources\n"
 
 namespace functions {
 
 namespace {
 
 Value ExecuteGenericTarget(const char* target_type,
                            Scope* scope,
                            const FunctionCallNode* function,
                            const std::vector<Value>& args,
                            BlockNode* block,
@@ skipping 312 matching lines @@
     "\n"
     "  Depending on a group is exactly like depending directly on that\n"
     "  group's deps. Direct dependent configs will get automatically\n"
     "  forwarded through the group so you shouldn't need to use\n"
     "  \"forward_dependent_configs_from.\n"
     "\n"
     "Variables\n"
     "\n"
     DEPS_VARS
     DEPENDENT_CONFIG_VARS
-    "  Other variables: external\n"
     "\n"
     "Example\n"
     "\n"
     "  group(\"all\") {\n"
     "    deps = [\n"
     "      \"//project:runner\",\n"
     "      \"//project:unit_tests\",\n"
     "    ]\n"
     "  }\n";
 
@@ skipping 122 matching lines @@
 Value RunTest(Scope* scope,
               const FunctionCallNode* function,
               const std::vector<Value>& args,
               BlockNode* block,
               Err* err) {
   return ExecuteGenericTarget(functions::kExecutable, scope, function, args,
                               block, err);
 }
 
 }  // namespace functions