Simplify the .gn file (#36)

.gn

@@ -17,40 +17,16 @@ check_targets = []
 secondary_source = "//v8/"
 
 default_args = {
-  # Various global chrome args that are unrelated to deno.
-  proprietary_codecs = false
-  safe_browsing_mode = 0
-  toolkit_views = false
-  use_aura = false
-  use_dbus = false
-  use_gio = false
-  use_glib = false
-  use_ozone = false
-  use_udev = false
-
-  # To disable "use_atk" and other features that we don't need.
-  is_desktop_linux = false
-
   linux_use_bundled_binutils = false
+  use_sysroot = false
 
   # TODO(ry) We may want to turn on CFI at some point. Disabling for simplicity
   # for now. See http://clang.llvm.org/docs/ControlFlowIntegrity.html
   is_cfi = false
-
-  # TODO(ry) Remove this so debug builds can link faster. Currently removing
-  # this breaks cargo build in debug mode in OSX.
-  is_component_build = false
-
-  use_sysroot = false
-
   use_dummy_lastchange = true
-
-  symbol_level = 1
   treat_warnings_as_errors = true
-
   # https://cs.chromium.org/chromium/src/docs/ccache_mac.md
   clang_use_chrome_plugins = false
-
   v8_enable_gdbjit = false
   v8_enable_i18n_support = false
   v8_enable_shared_ro_heap = false  # See #2624
@@ -60,7 +36,6 @@ default_args = {
   v8_use_external_startup_data = false
   v8_use_snapshot = true
   v8_postmortem_support = true  # for https://github.com/nodejs/llnode/
-
   # We don't want to require downloading the binary executable
   # tools/clang/dsymutil.
   enable_dsyms = false