Remove third_party/golang.org/x/mobile as it is no longer used with Go 1.5.

third_party/go/src/golang.org/x/mobile/bind/seq/seq_test.go

Index: third_party/go/src/golang.org/x/mobile/bind/seq/seq_test.go
diff --git a/third_party/go/src/golang.org/x/mobile/bind/seq/seq_test.go b/third_party/go/src/golang.org/x/mobile/bind/seq/seq_test.go
deleted file mode 100644
index cc2429273576277e5930934271b0fe9299a362a5..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/bind/seq/seq_test.go
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package seq
-
-import "testing"
-
-func TestBuffer(t *testing.T) {
-	buf := new(Buffer)
-	buf.WriteInt64(1 << 42)
-	buf.WriteInt32(1 << 13)
-	buf.WriteUTF16("Hello, world")
-	buf.WriteFloat64(4.02)
-	buf.WriteFloat32(1.2)
-	buf.WriteGoRef(new(int))
-	buf.WriteGoRef(new(int))
-
-	buf.Offset = 0
-
-	if got, want := buf.ReadInt64(), int64(1<<42); got != want {
-		t.Errorf("buf.ReadInt64()=%d, want %d", got, want)
-	}
-	if got, want := buf.ReadInt32(), int32(1<<13); got != want {
-		t.Errorf("buf.ReadInt32()=%d, want %d", got, want)
-	}
-	if got, want := buf.ReadUTF16(), "Hello, world"; got != want {
-		t.Errorf("buf.ReadUTF16()=%q, want %q", got, want)
-	}
-	if got, want := buf.ReadFloat64(), 4.02; got != want {
-		t.Errorf("buf.ReadFloat64()=%f, want %f", got, want)
-	}
-	if got, want := buf.ReadFloat32(), float32(1.2); got != want {
-		t.Errorf("buf.ReadFloat32()=%f, want %f", got, want)
-	}
-}