flow_generated/ and related dead-code cleanups (derive-refactor)

Remove vestigates of V1 derivation typescript generation.

Author: jgraettinger

.gitignore

@@ -3,16 +3,6 @@ target/
 .build/
 .build-ci/
 
-# Outputs from catalog build & test that we don't version.
-/dist
-/node_modules
-examples.db*
-
-# Ordinarily one *would* version package-lock.json.
-# In our case, though, we want early warning if dependencies of the
-# vanilla package.json produce broken builds.
-/package-lock.json
-
 # Typical IDE stuff.
 .vim
 *.swp