fix(scripts): Remove test output regeneration script (#3105)

Resolves #3097

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build build-endtoend test test-ci test-examples test-endtoend regen start psql mysqlsh proto
+.PHONY: build build-endtoend test test-ci test-examples test-endtoend start psql mysqlsh proto
 
 build:
 	go build ./...
@@ -20,9 +20,6 @@ build-endtoend:
 
 test-ci: test-examples build-endtoend vet
 
-regen: sqlc-dev sqlc-gen-json
-	go run ./scripts/regenerate/
-
 sqlc-dev:
 	go build -o ~/bin/sqlc-dev ./cmd/sqlc/
 

docs/guides/development.md

@@ -53,16 +53,3 @@ MYSQL_USER      root
 MYSQL_ROOT_PASSWORD  mysecretpassword
 MYSQL_DATABASE  dinotest
 ```
-
-## Regenerate expected test output
-
-If you need to update a large number of expected test output in the
-`internal/endtoend/testdata` directory, run the `regenerate` script.
-
-```
-go build -o ~/go/bin/sqlc-dev ./cmd/sqlc
-go run scripts/regenerate/main.go
-```
-
-Note that this uses the `sqlc-dev` binary, not `sqlc` so make sure you have an
-up to date `sqlc-dev` binary.