Revert of Add isnan() workaround for Intel Mac

gpu/config/gpu_driver_bug_list_json.cc

Index: gpu/config/gpu_driver_bug_list_json.cc
diff --git a/gpu/config/gpu_driver_bug_list_json.cc b/gpu/config/gpu_driver_bug_list_json.cc
index d6f24cb66a247385432a113a0604bc787e7f264f..bf190ddd88408f0a734eaf24d1a2cc335c107709 100644
--- a/gpu/config/gpu_driver_bug_list_json.cc
+++ b/gpu/config/gpu_driver_bug_list_json.cc
@@ -2027,24 +2027,6 @@
       "features": [
         "disable_post_sub_buffers_for_onscreen_surfaces"
       ]
-    },
-    {
-      "id": 191,
-      "description": "Emulate GLSL function isnan() on Intel Mac",
-      "cr_bugs": [650547],
-      "os": {
-        "type": "macosx"
-      },
-      "vendor_id": "0x8086",
-      "device_id" : [
-        "0x1902", "0x1906", "0x190A", "0x190B", "0x190E", "0x1912", "0x1913", "0x1915",
-        "0x1916", "0x1917", "0x191A", "0x191B", "0x191D", "0x191E", "0x1921", "0x1923",
-        "0x1926", "0x1927", "0x192A", "0x192B", "0x192D", "0x1932", "0x193A", "0x193B",
-        "0x193D"
-      ],
-      "features" : [
-        "emulate_isnan_on_float"
-      ]
     }
   ]
   // Please update the version number at beginning of this file whenever you