Remove test branch from GH workflow

Author: msanatan

.github/workflows/unity-tests.yml

@@ -2,7 +2,7 @@ name: Unity Tests
 
 on:
   push:
-    branches: [ main, unit-tests ]
+    branches: [ main ]
     paths:
       - TestProjects/UnityMCPTests/**
       - UnityMcpBridge/Editor/**