Don't open docs in webbrowser

Makefile

@@ -1,17 +1,4 @@
 .PHONY: clean clean-test clean-pyc clean-build docs help
-.DEFAULT_GOAL := help
-
-define BROWSER_PYSCRIPT
-import os, webbrowser, sys
-
-try:
-	from urllib import pathname2url
-except:
-	from urllib.request import pathname2url
-
-webbrowser.open("file://" + pathname2url(os.path.abspath(sys.argv[1])))
-endef
-export BROWSER_PYSCRIPT
 
 define PRINT_HELP_PYSCRIPT
 import re, sys
@@ -24,8 +11,6 @@ for line in sys.stdin:
 endef
 export PRINT_HELP_PYSCRIPT
 
-BROWSER := python -c "$$BROWSER_PYSCRIPT"
-
 help:
 	@python -c "$$PRINT_HELP_PYSCRIPT" < $(MAKEFILE_LIST)
 
@@ -63,7 +48,6 @@ coverage: ## check code coverage quickly with the default Python
 	coverage run --source glean_parser -m pytest
 	coverage report -m
 	coverage html
-	$(BROWSER) htmlcov/index.html
 
 docs: ## generate Sphinx HTML documentation, including API docs
 	rm -f docs/glean_parser.rst
@@ -71,7 +55,6 @@ docs: ## generate Sphinx HTML documentation, including API docs
 	sphinx-apidoc -o docs/ glean_parser
 	$(MAKE) -C docs clean
 	$(MAKE) -C docs html
-	$(BROWSER) docs/_build/html/index.html
 
 servedocs: docs ## compile the docs watching for changes
 	watchmedo shell-command -p '*.rst' -c '$(MAKE) -C docs html' -R -D .