COMP: Remove the ITK_USE_PYTHON_LIMITED_API option

Python wrapping requires 3.11, which is also the abi3 floor, so the
option could only ever be on. Every wrapped module is now built as an
abi3 extension and the CMake >= 3.26 requirement applies whenever
ITK_WRAP_PYTHON is enabled.

Author: hjmjohnson

CMake/ITKSetPython3Vars.cmake

@@ -94,7 +94,6 @@ else()
     )
   endif()
 
-  # start section to define package components based on LIMITED_API support and choices
   # Cached so the abi3 floor is a single source of truth shared with the module
   # wrapping macros (itk_end_wrap_module.cmake USE_SABI).
   set(
@@ -104,65 +103,21 @@ else()
     "Minimum Python minor version for the abi3 / Limited API floor"
   )
 
-  # Force ITK_WRAP_PYTHON_VERSION if SKBUILD_SABI_COMPONENT requests it
-  string(
-    FIND
-    "${SKBUILD_SABI_COMPONENT}"
-    "SABIModule"
-    _SKBUILD_SABI_COMPONENT_REQUIRED
-  )
-  if(NOT DEFINED ITK_USE_PYTHON_LIMITED_API)
-    if(
-      (
-        _SKBUILD_SABI_COMPONENT_REQUIRED
-          GREATER
-          -1
-      )
-      OR
-        ITK_WRAP_PYTHON_VERSION
-          VERSION_GREATER_EQUAL
-          ${_ITK_MINIMUM_SUPPORTED_LIMITED_API_VERSION}
+  if(CMAKE_VERSION VERSION_LESS "3.26")
+    message(
+      FATAL_ERROR
+      "CMake version ${CMAKE_VERSION} is too old for Python wrapping: "
+      "the FindPython Development.SABIModule component requires CMake >= 3.26. "
+      "Either upgrade CMake or set ITK_WRAP_PYTHON=OFF."
     )
-      set(
-        ITK_USE_PYTHON_LIMITED_API
-        1
-        CACHE BOOL
-        "Configure Python's limited API for Python minor version compatibility."
-      )
-    else()
-      set(
-        ITK_USE_PYTHON_LIMITED_API
-        0
-        CACHE BOOL
-        "Configure Python's limited API for Python minor version compatibility."
-      )
-    endif()
-    mark_as_advanced(ITK_USE_PYTHON_LIMITED_API)
   endif()
-  unset(_SKBUILD_SABI_COMPONENT_REQUIRED)
-  if(ITK_USE_PYTHON_LIMITED_API)
-    if(CMAKE_VERSION VERSION_LESS "3.26")
-      message(
-        FATAL_ERROR
-        "CMake version ${CMAKE_VERSION} is too old for Python limited API wrapping: "
-        "the FindPython Development.SABIModule component requires CMake >= 3.26. "
-        "Either upgrade CMake or disable ITK_USE_PYTHON_LIMITED_API."
-      )
-    endif()
 
-    set(
-      _python_find_components
-      Interpreter
-      Development.Module
-      Development.SABIModule
-    )
-  else()
-    set(
-      _python_find_components
-      Interpreter
-      Development.Module
-    )
-  endif()
+  set(
+    _python_find_components
+    Interpreter
+    Development.Module
+    Development.SABIModule
+  )
   if(BUILD_TESTING)
     # NumPy Required for testing ITK PythonTests, prefer to fail early if not installed
     list(APPEND _python_find_components NumPy)
@@ -253,7 +208,6 @@ else()
   unset(_python_find_components)
   # _ITK_MINIMUM_SUPPORTED_LIMITED_API_VERSION is cached (INTERNAL) and intentionally
   # left set so itk_end_wrap_module.cmake can pin USE_SABI to the same floor.
-  # end section to define package components based on LIMITED_API support and choices
   if(DEFINED _specified_Python3_EXECUTABLE)
     set(
       Python3_EXECUTABLE