Remove sampler border color from Dawn to match WebGPU

Bug: chromium:877147
Change-Id: I9760b3c6cb67a3ffa08feeaff8e8b24b80ec4200
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6380
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/dawn.json b/dawn.json
index daa4872..ac048fb 100644
--- a/dawn.json
+++ b/dawn.json
@@ -19,8 +19,7 @@
         "values": [
             {"value": 0, "name": "repeat"},
             {"value": 1, "name": "mirrored repeat"},
-            {"value": 2, "name": "clamp to edge"},
-            {"value": 3, "name": "clamp to border color"}
+            {"value": 2, "name": "clamp to edge"}
         ]
     },
     "bind group": {
@@ -128,14 +127,6 @@
     "bool": {
         "category": "native"
     },
-    "border color": {
-        "category": "enum",
-        "values": [
-            {"value": 0, "name": "transparent black"},
-            {"value": 1, "name": "opaque black"},
-            {"value": 2, "name": "opaque white"}
-        ]
-    },
     "buffer": {
         "category": "object",
         "methods": [
@@ -855,8 +846,7 @@
             {"name": "mipmap filter", "type": "filter mode"},
             {"name": "lod min clamp", "type": "float"},
             {"name": "lod max clamp", "type": "float"},
-            {"name": "compare function", "type": "compare function"},
-            {"name": "border color", "type": "border color"}
+            {"name": "compare function", "type": "compare function"}
         ]
     },
     "shader module": {