no python from msys2

recipes/icu/all/conanfile.py

@@ -126,11 +126,7 @@ def generate(self):
             # http://userguide.icu-project.org/icudata
             # This is the only directly supported behavior on Windows builds.
             tc.configure_args.append(f"--with-data-packaging={self.options.data_packaging}")
-        env = tc.environment()
-        msys2_bin = VirtualBuildEnv(self).vars().get("MSYS_BIN")
-        if msys2_bin:
-            env.define_path("PYTHON", unix_path(self, os.path.join(msys2_bin, "python")))
-        tc.generate(env)
+        tc.generate()
 
         if is_msvc(self):
             env = Environment()