Remove dotnet-format from dotnet-tools (#30317)

.config/dotnet-tools.json

@@ -8,12 +8,6 @@
         "dotnet-serve"
       ]
     },
-    "dotnet-format": {
-      "version": "5.0.210401",
-      "commands": [
-        "dotnet-format"
-      ]
-    },
     "playwright-sharp-tool": {
       "version": "0.170.2",
       "commands": [