[build] `make tar' should not follow `DESTDIR` (#4790)

Ref: https://www.gnu.org/prep/standards/html_node/DESTDIR.html
Authored by: satan1st

Makefile

@@ -33,7 +33,6 @@ completion-zsh: completions/zsh/_yt-dlp
 lazy-extractors: yt_dlp/extractor/lazy_extractors.py
 
 PREFIX ?= /usr/local
-DESTDIR ?= .
 BINDIR ?= $(PREFIX)/bin
 MANDIR ?= $(PREFIX)/man
 SHAREDIR ?= $(PREFIX)/share
@@ -134,7 +133,7 @@ yt_dlp/extractor/lazy_extractors.py: devscripts/make_lazy_extractors.py devscrip
 	$(PYTHON) devscripts/make_lazy_extractors.py $@
 
 yt-dlp.tar.gz: all
-	@tar -czf $(DESTDIR)/yt-dlp.tar.gz --transform "s|^|yt-dlp/|" --owner 0 --group 0 \
+	@tar -czf yt-dlp.tar.gz --transform "s|^|yt-dlp/|" --owner 0 --group 0 \
 		--exclude '*.DS_Store' \
 		--exclude '*.kate-swp' \
 		--exclude '*.pyc' \