chore: remove pull_request triggers from test workflows [skip ci]

It's already covered by pushes

Author: msanatan

.github/workflows/python-tests.yml

@@ -6,10 +6,6 @@ on:
     paths:
       - MCPForUnity/UnityMcpServer~/src/**
       - .github/workflows/python-tests.yml
-  pull_request:
-    paths:
-      - MCPForUnity/UnityMcpServer~/src/**
-      - .github/workflows/python-tests.yml
   workflow_dispatch: {}
 
 jobs:

.github/workflows/unity-tests.yml

@@ -8,11 +8,6 @@ on:
       - TestProjects/UnityMCPTests/**
       - MCPForUnity/Editor/**
       - .github/workflows/unity-tests.yml
-  pull_request:
-    paths:
-      - TestProjects/UnityMCPTests/**
-      - MCPForUnity/Editor/**
-      - .github/workflows/unity-tests.yml
 
 jobs:
   testAllModes: