python: Remove warning about invalid install path

It was originally added because proper detection was not working on
Debian, but that has been fixed since. It was causing annoying warning
by default when prefix is /usr/local that can only be avoided by setting
options.

mesonbuild/modules/python.py

@@ -326,7 +326,6 @@ print(json.dumps({
   'variables': variables,
   'paths': paths,
   'install_paths': install_paths,
-  'sys_paths': sys.path,
   'version': sysconfig.get_python_version(),
   'platform': sysconfig.get_platform(),
   'is_pypy': '__pypy__' in sys.builtin_module_names,
@@ -415,14 +414,6 @@ class PythonExternalProgram(ExternalProgram):
         value = state.get_option(f'{key}dir', module='python')
         if value:
             return value
-        # Use python's path relative to prefix, and warn if that's not a location
-        # python will lookup for modules.
-        abs_path = Path(state.get_option('prefix'), rel_path)
-        sys_paths = [Path(i) for i in self.info['sys_paths']]
-        if abs_path not in sys_paths:
-            mlog.warning('Python files installed by Meson might not be found by python interpreter.\n',
-                         f'This warning can be avoided by setting "python.{key}dir" option.',
-                         once=True)
         return rel_path