chore: force clean rm

Signed-off-by: Brian Harring <ferringb@gmail.com>

Author: ferringb

Makefile

@@ -1,5 +1,4 @@
 PYTHON ?= python
-SPHINX_BUILD ?= $(PYTHON) -m sphinx.cmd.build
 
 .PHONY: man html
 man html:
@@ -21,7 +20,7 @@ release: sdist wheel
 
 .PHONY: clean
 clean:
-	$(RM) -r build doc/api doc/generated dist
+	$(RM) -rf build doc/api doc/generated dist
 	$(MAKE) -C data/lib/pkgcore/ebd clean
 
 .PHONY: format