Update README.md

There's no longer a python subprocess since switching to tree-sitter in https://github.com/bazelbuild/rules_python/pull/1895

gazelle/README.md

diff --git a/gazelle/README.md b/gazelle/README.md
index 55c9cc9..01cf45a 100644
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@@ -654,8 +654,7 @@
 
 ## Developer Notes
 
-Gazelle extensions are written in Go. This gazelle plugin is a hybrid, as it uses Go to execute a
-Python interpreter as a subprocess to parse Python source files.
+Gazelle extensions are written in Go.
 See the gazelle documentation https://github.com/bazelbuild/bazel-gazelle/blob/master/extend.md
 for more information on extending Gazelle.