remove root Makefile and get rid of cd in drone ci

Makefile

@@ -1,56 +0,0 @@
-SHELL := bash
-NAME := ocis
-IMPORT := github.com/owncloud/$(NAME)
-HUGO := hugo
-
-.PHONY: all
-all: build
-
-.PHONY: sync
-sync:
-	go mod download
-
-.PHONY: clean
-clean:
-	rm -rf $(HUGO)
-
-.PHONY: docs-copy
-docs-copy:
-	mkdir -p $(HUGO); \
-	mkdir -p $(HUGO)/content/; \
-	cd $(HUGO); \
-	git init; \
-	git remote rm origin; \
-	git remote add origin https://github.com/owncloud/owncloud.github.io; \
-	git fetch --depth=1; \
-	git checkout origin/source -f; \
-	rsync -ax --delete ../docs/ content/; \
-
-.PHONY: config-docs-generate
-config-docs-generate:
-	go run github.com/owncloud/flaex >| docs/configuration.md
-
-.PHONY: docs-build
-docs-build:
-	cd $(HUGO); hugo
-
-.PHONY: docs
-docs: docs-copy docs-build
-
-BEHAT_BIN=vendor-bin/behat/vendor/bin/behat
-
-.PHONY: test-acceptance-api
-test-acceptance-api: vendor-bin/behat/vendor
-	BEHAT_BIN=$(BEHAT_BIN) $(PATH_TO_CORE)/tests/acceptance/run.sh --remote --type api
-
-vendor/bamarni/composer-bin-plugin: composer.lock
-	composer install
-
-vendor-bin/behat/vendor: vendor/bamarni/composer-bin-plugin vendor-bin/behat/composer.lock
-	composer bin behat install --no-progress
-
-vendor-bin/behat/composer.lock: vendor-bin/behat/composer.json
-	@echo behat composer.lock is not up to date.
-
-composer.lock: composer.json
-	@echo composer.lock is not up to date.