build: remove unused flags in toolchain.gypi and node_gyp.py

tools/gyp_node.py

@@ -45,12 +45,6 @@ def run_gyp(args):
   args.append('-Dcomponent=static_library')
   args.append('-Dlibrary=static_library')
 
-  # Don't compile with -B and -fuse-ld=, we don't bundle ld.gold.  Can't be
-  # set in common.gypi due to how deps/v8/build/toolchain.gypi uses them.
-  args.append('-Dlinux_use_bundled_binutils=0')
-  args.append('-Dlinux_use_bundled_gold=0')
-  args.append('-Dlinux_use_gold_flags=0')
-
   rc = gyp.main(args)
   if rc != 0:
     print('Error running GYP')

tools/v8_gypfiles/toolchain.gypi

@@ -99,34 +99,6 @@
       ['OS=="linux" and host_arch=="ia32"', {
         'binutils_dir%': 'third_party/binutils/Linux_ia32/Release/bin',
       }],
-
-      # linux_use_bundled_gold: whether to use the gold linker binary checked
-      # into third_party/binutils.  Force this off via GYP_DEFINES when you
-      # are using a custom toolchain and need to control -B in ldflags.
-      # Do not use 32-bit gold on 32-bit hosts as it runs out address space
-      # for component=static_library builds.
-      ['((OS=="linux" or OS=="android") and (target_arch=="x64" or target_arch=="arm" or (target_arch=="ia32" and host_arch=="x64"))) or (OS=="linux" and target_arch=="mipsel")', {
-        'linux_use_bundled_gold%': 1,
-      }, {
-        'linux_use_bundled_gold%': 0,
-      }],
-      # linux_use_bundled_binutils: whether to use the binary binutils
-      # checked into third_party/binutils.  These are not multi-arch so cannot
-      # be used except on x86 and x86-64 (the only two architectures which
-      # are currently checke in).  Force this off via GYP_DEFINES when you
-      # are using a custom toolchain and need to control -B in cflags.
-      ['OS=="linux" and (target_arch=="ia32" or target_arch=="x64")', {
-        'linux_use_bundled_binutils%': 1,
-      }, {
-        'linux_use_bundled_binutils%': 0,
-      }],
-      # linux_use_gold_flags: whether to use build flags that rely on gold.
-      # On by default for x64 Linux.
-      ['OS=="linux" and target_arch=="x64"', {
-        'linux_use_gold_flags%': 1,
-      }, {
-        'linux_use_gold_flags%': 0,
-      }],
     ],
 
     # Indicates if gcmole tools are downloaded by a hook.
@@ -990,26 +962,6 @@
           '-mx32',
         ],
       }],  # v8_target_arch=="x32"
-      ['linux_use_gold_flags==1', {
-        # Newer gccs and clangs support -fuse-ld, use the flag to force gold
-        # selection.
-        # gcc -- http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Optimize-Options.html
-        'ldflags': [ '-fuse-ld=gold', ],
-      }],
-      ['linux_use_bundled_binutils==1', {
-        'cflags': [
-          '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
-        ],
-      }],
-      ['linux_use_bundled_gold==1', {
-        # Put our binutils, which contains gold in the search path. We pass
-        # the path to gold to the compiler. gyp leaves unspecified what the
-        # cwd is when running the compiler, so the normal gyp path-munging
-        # fails us. This hack gets the right path.
-        'ldflags': [
-          '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
-        ],
-      }],
       ['OS=="win"', {
         'defines': [
           'WIN32',
@@ -1195,21 +1147,6 @@
               }],
             ],
           }],
-          ['linux_use_gold_flags==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'ldflags': [
-                  # Experimentation found that using four linking threads
-                  # saved ~20% of link time.
-                  # https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
-                  # Only apply this to the target linker, since the host
-                  # linker might not be gold, but isn't used much anyway.
-                  '-Wl,--threads',
-                  '-Wl,--thread-count=4',
-                ],
-              }],
-            ],
-          }],
           ['v8_optimized_debug==0', {
             'msvs_settings': {
               'VCCLCompilerTool': {