dont install kerberos for windows

Author: kevinjqliu

pyproject.toml

@@ -87,7 +87,8 @@ cachetools = ">=5.5,<7.0"
 pyiceberg-core = { version = ">=0.5.1,<0.7.0", optional = true }
 polars = { version = "^1.21.0", optional = true }
 thrift-sasl = { version = ">=0.4.3", optional = true }
-kerberos = {version = "^1.3.1", optional = true}
+# kerberos does not build / work on Windows. Only include on non-Windows platforms.
+kerberos = { version = "^1.3.1", optional = true, markers = "sys_platform != 'win32'" }
 datafusion = { version = ">=45", optional = true }
 
 [tool.poetry.group.dev.dependencies]