fix: remove buggy module-sync exports field

Author: JounQin

.github/FUNDING.yml

@@ -8,4 +8,4 @@ patreon: 1stG
 custom:
   - https://opencollective.com/1stG
   - https://opencollective.com/rxts
-  - https://afdian.net/@JounQin
+  - https://afdian.com/a/JounQin

package.json

@@ -23,17 +23,9 @@
         "types": "./lib/index.d.ts",
         "default": "./lib/index.js"
       },
-      "module-sync": {
-        "types": "./lib/index.d.ts",
-        "default": "./lib/index.js"
-      },
       "require": {
         "types": "./index.d.cts",
         "default": "./lib/index.cjs"
-      },
-      "default": {
-        "types": "./lib/index.d.ts",
-        "default": "./lib/index.js"
       }
     },
     "./package.json": "./package.json"