Update libwmf v0.2.12 to v0.2.13

The two patches are no longer needed as they've been fixed in the new
release[0][1].

[0] caolanm/libwmf@cbfdcac
[1] caolanm/libwmf@398c41a

org.gimp.GIMP.json

@@ -540,23 +540,15 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://github.com/caolanm/libwmf/archive/refs/tags/v0.2.12.tar.gz",
-                    "sha512": "9280851e560becc91546906b911e0c59a1abd690e10680f6d94a335d66aeaec5eb12ccf2214ee7af2a15729a7b5f8b906022822399b4e2bc12c75a2d75748cab",
+                    "url": "https://github.com/caolanm/libwmf/archive/refs/tags/v0.2.13.tar.gz",
+                    "sha512": "f45a936c9bc98fc1a5f2b0808b497119e4dcd3c132615fdddb7583e5719c7d1d7f85c16ebf313cad453e5b7ae3508bf6b80c4ed2b42322b7dec295d8f4eb86ce",
                     "x-checker-data": {
                         "type": "anitya",
                         "project-id": 230209,
                         "stable-only": true,
                         "url-template": "https://github.com/caolanm/libwmf/archive/refs/tags/v$version.tar.gz"
                     }
                 },
-                {
-                    "type": "patch",
-                    "path": "patches/libwmf-ft2.patch"
-                },
-                {
-                    "type": "patch",
-                    "path": "patches/libwmf-autoheader.patch"
-                },
                 {
                     "type": "shell",
                     "commands": [