remove old r builds

Author: harryturr

Diff for: package.json

@@ -19,8 +19,6 @@
     "private::test.R.deploy-components": "npm run private::test.setup-components && cd \\@plotly/dash-test-components && sudo R CMD INSTALL .",
     "private::test.R.deploy-nested": "npm run private::test.setup-nested && cd \\@plotly/dash-generator-test-component-nested && sudo R CMD INSTALL .",
     "private::test.R.deploy-standard": "npm run private::test.setup-standard && cd \\@plotly/dash-generator-test-component-standard && sudo R CMD INSTALL .",
-    "private::test.R.deploy-persisted": "npm run private::test.setup-persisted && cd \\@plotly/dash-generator-test-component-persisted && sudo R CMD INSTALL .",
-    "private::test.R.deploy-persisted-nested": "npm run private::test.setup-persisted-nested && cd \\@plotly/dash-generator-test-component-persisted-nested && sudo R CMD INSTALL .",
     "private::test.unit-dash": "pytest tests/unit",
     "private::test.unit-renderer": "cd dash-renderer && npm run test",
     "private::test.integration-dash": "TESTFILES=$(circleci tests glob \"tests/integration/**/test_*.py\" | circleci tests split --split-by=timings) && pytest --headless --nopercyfinalize --junitxml=test-reports/junit_intg.xml ${TESTFILES}",