build: remove redundant Makefile target

The only target that uses the
`tools/doc/node_modules/js-yaml/package.json` target is `doc-only`. As a
result of a recent change, it has `tools/doc/node_modules` as a
prerequisite, which does the exact same npm install as
`tools/doc/node_modules/js-yaml/package.json`. Remove
`tools/doc/node_modules/js-yaml/package.json` as unnecessary.

PR-URL: #21915
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Makefile

@@ -619,11 +619,6 @@ apiassets = $(subst api_assets,api/assets,$(addprefix out/,$(wildcard doc/api_as
 .PHONY: doc-only
 doc-only: tools/doc/node_modules \
 	$(apidoc_dirs) $(apiassets)  ## Builds the docs with the local or the global Node.js binary.
-# If it's a source tarball, assets are already in doc/api/assets,
-# no need to install anything, we have already copied the docs over
-	if [ ! -d doc/api/assets ]; then \
-		$(MAKE) tools/doc/node_modules/js-yaml/package.json; \
-	fi;
 	@$(MAKE) out/doc/api/all.html out/doc/api/all.json
 
 .PHONY: doc
@@ -662,9 +657,6 @@ available-node = \
 run-npm-install = $(PWD)/$(NPM) install --production --no-package-lock
 run-npm-ci = $(PWD)/$(NPM) ci
 
-tools/doc/node_modules/js-yaml/package.json:
-	cd tools/doc && $(call available-node,$(run-npm-install))
-
 gen-json = tools/doc/generate.js --format=json $< > $@
 gen-html = tools/doc/generate.js --node-version=$(FULLVERSION) --format=html \
 			--analytics=$(DOCS_ANALYTICS) $< > $@