Disable wasm runner for now (#3478)

Author: buenaflor

.github/workflows/flutter.yml

@@ -43,14 +43,10 @@ jobs:
             os: windows
           - target: js
             os: ubuntu
-          - target: wasm
-            os: ubuntu
         exclude:
-          # Flutter WASM tests don't compile on beta currently.
-          # We can re-enable when it is fixed by Flutter.
-          # https://github.com/getsentry/sentry-dart/pull/3003
+          # Flutter WASM tests don't compile on beta currently and hangs on stable.
+          # https://github.com/getsentry/sentry-dart/issues/3477
           - target: wasm
-            sdk: beta
 
     steps:
       - uses: actions/checkout@v6