Remove obsolete html.elements.input.mozactionhint (#28309)

Author: caugner

html/elements/input.json

@@ -950,38 +950,6 @@
             }
           }
         },
-        "mozactionhint": {
-          "__compat": {
-            "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/input#non-standard_attributes",
-            "support": {
-              "chrome": {
-                "version_added": false
-              },
-              "chrome_android": "mirror",
-              "edge": "mirror",
-              "firefox": {
-                "version_added": "4",
-                "version_removed": "119"
-              },
-              "firefox_android": "mirror",
-              "oculus": "mirror",
-              "opera": "mirror",
-              "opera_android": "mirror",
-              "safari": {
-                "version_added": false
-              },
-              "safari_ios": "mirror",
-              "samsunginternet_android": "mirror",
-              "webview_android": "mirror",
-              "webview_ios": "mirror"
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": false,
-              "deprecated": true
-            }
-          }
-        },
         "multiple": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/multiple",