Drop object[typemustmatch]/typeMustMatch IDL attr (#9671)

This change deletes “typeMustMatch” from api/HTMLObjectElement.json
and deletes “typemustmatch” from html/elements/object.json.

The history of typeMustMatch/typemustmatch is that it was added to the
spec in 2011 in whatwg/html@4030e71 but never
got implemented across browsers and never got adopted by web developers.
So whatwg/html#4590 dropped it from the spec in
2019, and it's now just a footnote in the “Non-conforming features” section
at https://html.spec.whatwg.org/obsolete.html#attr-object-typemustmatch

So there's statistically near-zero content on the web that’s using
typeMustMatch/typemustmatch, and there’s no value to continue
tracking support data for it in BCD.

Related MDN content change: mdn/content#3655

api/HTMLObjectElement.json

@@ -1007,56 +1007,6 @@
           }
         }
       },
-      "typeMustMatch": {
-        "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/HTMLObjectElement/typeMustMatch",
-          "support": {
-            "chrome": {
-              "version_added": false
-            },
-            "chrome_android": {
-              "version_added": false
-            },
-            "edge": {
-              "version_added": false
-            },
-            "firefox": {
-              "version_added": "27",
-              "version_removed": "68"
-            },
-            "firefox_android": {
-              "version_added": "27",
-              "version_removed": "68"
-            },
-            "ie": {
-              "version_added": false
-            },
-            "opera": {
-              "version_added": false
-            },
-            "opera_android": {
-              "version_added": false
-            },
-            "safari": {
-              "version_added": false
-            },
-            "safari_ios": {
-              "version_added": false
-            },
-            "samsunginternet_android": {
-              "version_added": false
-            },
-            "webview_android": {
-              "version_added": false
-            }
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": true,
-            "deprecated": false
-          }
-        }
-      },
       "useMap": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/HTMLObjectElement/useMap",

html/elements/object.json

@@ -721,53 +721,6 @@
             }
           }
         },
-        "typemustmatch": {
-          "__compat": {
-            "support": {
-              "chrome": {
-                "version_added": null
-              },
-              "chrome_android": {
-                "version_added": null
-              },
-              "edge": {
-                "version_added": null
-              },
-              "firefox": {
-                "version_added": "27"
-              },
-              "firefox_android": {
-                "version_added": "27"
-              },
-              "ie": {
-                "version_added": null
-              },
-              "opera": {
-                "version_added": null
-              },
-              "opera_android": {
-                "version_added": null
-              },
-              "safari": {
-                "version_added": null
-              },
-              "safari_ios": {
-                "version_added": null
-              },
-              "samsunginternet_android": {
-                "version_added": null
-              },
-              "webview_android": {
-                "version_added": null
-              }
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": true,
-              "deprecated": true
-            }
-          }
-        },
         "usemap": {
           "__compat": {
             "support": {