remove "deploy" paragraph from Appveyor CI script

it isn't safe and doesn't work anyway

appveyor.yml

@@ -116,26 +116,3 @@ test_script:
 artifacts:
   - path: bin\lz4_x64.zip
   - path: bin\lz4_x86.zip
-
-deploy:
-- provider: GitHub
-  artifact: bin\lz4_x64.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw64"
-    appveyor_repo_tag: true
-
-- provider: GitHub
-  artifact: bin\lz4_x86.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw32"
-    appveyor_repo_tag: true