ci: only run build during e2e tests

This *should* check everything that running just `build` would. If we
keep the `build` check, then we probably need to clear the `nx` cache or
something in order to be able to run `build:e2e` later.

Related to #83

.github/workflows/default.yml

@@ -54,11 +54,9 @@ jobs:
 
       - name: Checks
         run: |
-          pnpm install
           pnpm exec nx affected -t migrate:test
           pnpm exec nx affected -t migrate:e2e
           pnpm exec nx affected -t lint,tsc,test:coverage --verbose
-          pnpm exec nx run-many -t build
 
       - name: E2E tests
         run: |