tools/gn: Remove code for forward_dependent_configs_from variable.

tools/gn/misc/vim/syntax/gn.vim

Index: tools/gn/misc/vim/syntax/gn.vim
diff --git a/tools/gn/misc/vim/syntax/gn.vim b/tools/gn/misc/vim/syntax/gn.vim
index d9757e35c85492456669ecd2f1247080228642b5..b7cef23ec04878d30455fc819c1030d52990d9bc 100644
--- a/tools/gn/misc/vim/syntax/gn.vim
+++ b/tools/gn/misc/vim/syntax/gn.vim
@@ -44,10 +44,10 @@ syn keyword     gnVariable all_dependent_configs allow_circular_includes_from
 syn keyword     gnVariable args asmflags cflags cflags_c cflags_cc cflags_objc
 syn keyword     gnVariable cflags_objcc check_includes complete_static_lib
 syn keyword     gnVariable configs data data_deps defines depfile deps
-syn keyword     gnVariable forward_dependent_configs_from include_dirs inputs
-syn keyword     gnVariable ldflags lib_dirs libs output_extension output_name
-syn keyword     gnVariable outputs public public_configs public_deps script
-syn keyword     gnVariable sources testonly visibility
+syn keyword     gnVariable include_dirs inputs ldflags lib_dirs libs
+syn keyword     gnVariable output_extension output_name outputs public
+syn keyword     gnVariable public_configs public_deps scripte sources testonly
+syn keyword     gnVariable visibility
 hi def link     gnVariable          Keyword
 
 " Strings