[go] fuchsia-root argument is unused by go build

Change-Id: I7dac9443f5c9e2d721f22aca6bdf94a1f2ce50ce
diff --git a/go/build.py b/go/build.py
index a808d80..70475e8 100755
--- a/go/build.py
+++ b/go/build.py
@@ -18,8 +18,6 @@
 
 def main():
     parser = argparse.ArgumentParser()
-    parser.add_argument('--fuchsia-root', help='Path to root of Fuchsia project',
-                        required=True)
     parser.add_argument('--godepfile', help='Path to godepfile tool', required=True)
     parser.add_argument('--root-out-dir', help='Path to root of build output',
                         required=True)
diff --git a/go/go_build.gni b/go/go_build.gni
index c55d77d..7f62b39 100644
--- a/go/go_build.gni
+++ b/go/go_build.gni
@@ -83,8 +83,6 @@
     args = [
       "--godepfile",
       rebase_path(godepfile, "", root_build_dir),
-      "--fuchsia-root",
-      rebase_path("//."),
       "--root-out-dir",
       rebase_path(root_out_dir, root_build_dir),
       "--depfile",