Drop ci.yml changes; rely on existing 'go test ./...' step

TestGoModHasNoReplaceDirectives already runs as part of the existing
test job, so no separate CI job is needed to catch regressions of #4397.

Author: claude

.github/workflows/ci.yml

@@ -22,22 +22,6 @@ jobs:
         CGO_ENABLED: "0"
         GOOS: ${{ matrix.goos }}
         GOARCH: ${{ matrix.goarch }}
-  # Runs the TestGoModHasNoReplaceDirectives test (and nothing else) as its own
-  # job so a regression of https://github.com/sqlc-dev/sqlc/issues/4397 is easy
-  # to spot in the GitHub UI. The full 'test' job below runs the same check as
-  # part of 'go test ./...', but it takes much longer to finish and a failure
-  # there is less obvious at a glance.
-  go_install:
-    name: verify 'go install ...@latest' compatibility
-    runs-on: ubuntu-24.04
-    steps:
-    - uses: actions/checkout@v6
-    - uses: actions/setup-go@v6
-      with:
-        go-version: '1.26.2'
-    - name: check go.mod has no replace directives
-      run: go test -run TestGoModHasNoReplaceDirectives -v .
-
   test:
     runs-on: ubuntu-24.04
     steps: