Python: Do not use bundled `uniffi-bindgen` wrapper

Makefile

@@ -43,17 +43,14 @@ build-apk: build-kotlin ## Build an apk of the Glean sample app
 	./gradlew glean-sample-app:build glean-sample-app:assembleAndroidTest
 
 build-python: setup-python ## Build the Python bindings
-	PATH=$(PWD)/bin:$(PATH) \
 	VIRTUAL_ENV=$(GLEAN_PYENV) \
 		$(GLEAN_PYENV)/bin/maturin develop
 
 build-python-wheel: setup-python  ## Build a Python wheel
-	PATH=$(PWD)/bin:$(PATH) \
 	VIRTUAL_ENV=$(GLEAN_PYENV) \
 		$(GLEAN_PYENV)/bin/maturin build --release $(MATURIN_FLAG)
 
 build-python-sdist: setup-python ## Build a Python source distribution
-	PATH=$(PWD)/bin:$(PATH) \
 	VIRTUAL_ENV=$(GLEAN_PYENV) \
 		$(GLEAN_PYENV)/bin/maturin build --release --sdist $(MATURIN_FLAG)
 

bin/uniffi-bindgen

@@ -1,6 +0,0 @@
-#!/bin/sh
-
-# This is a host tool. Do not listen to the build target.
-unset CARGO_BUILD_TARGET
-
-exec cargo run --package uniffi-bindgen -- $*