chore(man): Don't compress man pages during build (#69)

Compressing man pages is a distribution / user preference that should be handled on the packaging side of things.

Indeed, compressing man pages by default imposes a compression algorithm / level for users whereas most package managers handle that already and allow users to choose / configure them (if wanted at all).
Additionally, it can lead to unexpected side effects. For instance, gzip recording timestamps in metadata by default, which prevents reproducible builds (see 51efce8).

See https://cmpct.info/~sam/blog/posts/automatic-manpage-compression/ for detailed rational.

Makefile

@@ -7,9 +7,6 @@ PREFIX ?= /usr/local
 build:
 	# Generate man page
 	scdoc < "doc/man/${pkgname}.1.scd" > "doc/man/${pkgname}.1"
-
-	# Archive man page
-	gzip -nc "doc/man/${pkgname}.1" > "doc/man/${pkgname}.1.gz"
 
 test:
 	# Run some simple unit tests on basic functions
@@ -25,14 +22,14 @@ install:
 	install -Dm 644 "res/completions/${pkgname}.fish" "${DESTDIR}${PREFIX}/share/fish/vendor_completions.d/${pkgname}.fish"
 
 	# Install man page
-	install -Dm 644 "doc/man/${pkgname}.1.gz" "${DESTDIR}${PREFIX}/share/man/man1/${pkgname}.1.gz"
+	install -Dm 644 "doc/man/${pkgname}.1" "${DESTDIR}${PREFIX}/share/man/man1/${pkgname}.1"
 
 	# Install documentation
 	install -Dm 644 README.md "${DESTDIR}${PREFIX}/share/doc/${pkgname}/README.md"
 
 clean:
-	# Delete generated and archived man page
-	rm -f "doc/man/${pkgname}.1"{,.gz}
+	# Delete generated man page
+	rm -f "doc/man/${pkgname}.1"
 
 uninstall:
 	# Delete the main script
@@ -44,7 +41,7 @@ uninstall:
 	rm -f "${DESTDIR}${PREFIX}/share/fish/vendor_completions.d/${pkgname}.fish"
 
 	# Delete man pages
-	rm -f "${DESTDIR}${PREFIX}/share/man/man1/${pkgname}.1.gz"
+	rm -f "${DESTDIR}${PREFIX}/share/man/man1/${pkgname}.1"
 
 	# Delete documentation
 	rm -rf "${DESTDIR}${PREFIX}/share/doc/${pkgname}/"