Remove most legacy generated files. (#399)

* Remove legacy Beats fields.yml file
* Remove legacy schema.csv file

CHANGELOG.next.md

@@ -18,7 +18,6 @@
 
 ### Deprecated
 
-* Move old `fields.yml` file from the root of the repo to `generated/legacy`. #386
 
 <!-- All empty sections:
 

Makefile

@@ -31,19 +31,14 @@ check-license-headers:
 .PHONY: clean
 clean:
 	rm -rf schema.json build
-	rm -rf generated/legacy/{schema.csv,template.json,fields.yml}
+	rm -rf generated/legacy/template.json
 	# Clean all markdown files for use-cases
 	find ./use-cases -type f -name '*.md' -not -name 'README.md' -print0 | xargs -0 rm --
 
 # Alias to generate source code for all languages.
 .PHONY: codegen
 codegen: gocodegen
 
-# Build schema.csv from schema files.
-.PHONY: csv
-csv: ve
-	$(PYTHON) scripts/schemas.py
-
 # Build the asciidoc book.
 .PHONY: docs
 docs:
@@ -52,16 +47,6 @@ docs:
 	fi
 	./build/docs/build_docs.pl --doc ./docs/index.asciidoc --chunk=1 $(OPEN_DOCS) -out ./build/html_docs
 
-# Build the legacy fields.yml file.
-.PHONY: fields_legacy
-fields_legacy:
-	cat schemas/*.yml > fields.tmp.yml
-	sed -i.bak 's/^/    /g' fields.tmp.yml
-	sed -i.bak 's/---//g' fields.tmp.yml
-	cat generated/legacy/fields_header.yml > generated/legacy/fields.yml
-	cat fields.tmp.yml >> generated/legacy/fields.yml
-	rm -f fields.tmp.yml fields.tmp.yml.bak
-
 # Format code and files in the repo.
 .PHONY: fmt
 fmt: ve
@@ -71,7 +56,7 @@ fmt: ve
 
 # Alias to generate everything.
 .PHONY: generate
-generate: csv readme template fields_legacy codegen generator
+generate: readme template codegen generator
 
 # Run the new generator
 .PHONY: generator