Remove a patch with a High Sierra rendering glitches workaround

The changes are already there.

patches/043-fix_rendering_glitches_on_high_sierra.patch

@@ -1,29 +0,0 @@
-diff --git a/gpu/config/software_rendering_list.json b/gpu/config/software_rendering_list.json
-index ed5c6d6c0e3c..ffec922b199d 100644
---- a/gpu/config/software_rendering_list.json
-+++ b/gpu/config/software_rendering_list.json
-@@ -1532,6 +1532,24 @@
-       "features": [
-         "gpu_rasterization"
-       ]
-+    },
-+    {
-+      "id": 150,
-+      "description": "Macs with NVidia GPUs experience rendering issues on High Sierra",
-+      "cr_bugs": [773705],
-+      "os": {
-+        "type": "macosx",
-+        "version": {
-+          "op": ">=",
-+          "value": "10.13"
-+        }
-+      },
-+      "vendor_id": "0x10de",
-+      "multi_gpu_category": "any",
-+      "features": [
-+        "accelerated_2d_canvas",
-+        "gpu_rasterization"
-+      ]
-     }
-   ],
-   "comment": [