fix(internal/librariangen): remove rogue source path in configure (#13249)

Author: jskeet

internal/librariangen/configure/configure.go

@@ -207,7 +207,7 @@ func configureLibrary(ctx context.Context, cfg *Config, library *request.Library
 	// - internal/version.go
 	// - go.mod
 	if len(library.APIs) == 1 {
-		library.SourcePaths = []string{library.ID, "internal/generated/", "internal/generated/snippets/" + library.ID}
+		library.SourcePaths = []string{library.ID, "internal/generated/snippets/" + library.ID}
 		library.RemoveRegex = []string{"^internal/generated/snippets/" + library.ID + "/"}
 		library.TagFormat = "{id}/v{version}"
 		library.Version = "0.0.0"

internal/librariangen/configure/configure_test.go

@@ -154,7 +154,7 @@ func TestConfigure(t *testing.T) {
 		APIs: []request.API{
 			{Path: "google/cloud/capacityplanner/v1beta", ServiceConfig: "service.yaml", Status: "new"},
 		},
-		SourcePaths: []string{"capacityplanner", "internal/generated/", "internal/generated/snippets/capacityplanner"},
+		SourcePaths: []string{"capacityplanner", "internal/generated/snippets/capacityplanner"},
 		RemoveRegex: []string{
 			"^internal/generated/snippets/capacityplanner/",
 			"^apiv1beta/[^/]*_client\\.go$",