Don't build with Python 3.11.

For some reason the generation of the .msi installer is failing with Python 3.11.  It fails with error: error: invalid format 'msi'. The documentation the argument `--format=msi` should be correct. 

https://docs.python.org/3/distutils/builtdist.html

appveyor.yml

@@ -59,18 +59,6 @@ environment:
       OPENSSL_LIB: "https://ci.appveyor.com/api/buildjobs/q63539qt9yqaqspo/artifacts/YARA.OpenSSL.x64.1.1.1.nupkg"
       VS: "Visual Studio 14 2015 Win64"
 
-    - PYTHON: "C:\\Python311"
-      PYTHON_VERSION: "3.11.0"
-      PYTHON_ARCH: "32"
-      OPENSSL_LIB: "https://ci.appveyor.com/api/buildjobs/fakubeldw67e9pmg/artifacts/YARA.OpenSSL.x86.1.1.1.nupkg"
-      VS: "Visual Studio 14 2015"
-
-    - PYTHON: "C:\\Python311-x64"
-      PYTHON_VERSION: "3.11.0"
-      PYTHON_ARCH: "64"
-      OPENSSL_LIB: "https://ci.appveyor.com/api/buildjobs/q63539qt9yqaqspo/artifacts/YARA.OpenSSL.x64.1.1.1.nupkg"
-      VS: "Visual Studio 14 2015 Win64"
-
 install:
   # If there is a newer build queued for the same PR, cancel this one.
   # The AppVeyor 'rollout builds' option is supposed to serve the same