Fix user-manual build

crm/user-manual/Makefile

@@ -21,7 +21,6 @@ else
 	#SP_ENCODING="UTF-8" xmllint --encode utf8 --xinclude src/index.xml > user-manual.xml
 endif
 	sed -i 's/xml:base=".*"//g' user-manual.xml
-	rm -f user-manual.md
 
 html: user-manual.xml 
 	@echo Creating html document
@@ -32,14 +31,12 @@ html: user-manual.xml
 	# Working around images used in stylesheets
 	mkdir bin/html/resources/docbook
 	cp -a $(DOCBOOK-XSL)/images bin/html/resources/docbook
-	rm -f user-manual.xml
 
 pdf: user-manual.xml
 	@echo Creating pdf document
 	mkdir -p bin/pdf
 #	SP_ENCODING="UTF-8" docbook2pdf -o bin user-manual.xml
 	dblatex -b xetex -o bin/user-manual.pdf user-manual.xml
-	rm -f user-manual.xml
 
 docx: user-manual.md
 	mkdir -p bin/docx