goldfish-opengl: fix double definition of threadstore

Just a minor change.

BUG=202552093
TEST=compile

Change-Id: I52e7133689efac74731b7d943e2fd6d55876fb1b
diff --git a/BUILD.gn b/BUILD.gn
index 679b60c..16dcc56 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -32,7 +32,6 @@
     "android-emu/android/base/threads/AndroidFunctorThread.h",
     "android-emu/android/base/threads/AndroidThread.h",
     "android-emu/android/base/threads/AndroidThreadStore.h",
-    "android-emu/android/base/threads/AndroidThreadStore.h",
     "android-emu/android/base/threads/AndroidThreadTypes.h",
     "android-emu/android/base/threads/AndroidThread_pthread.cpp",
     "android-emu/android/base/threads/AndroidWorkPool.cpp",