more small tweaks, phetsims/chipper#1463

tsconfig/buildtools/tsconfig.json

@@ -1,19 +1,4 @@
 {
-  "extends": "../shared/tsconfig-node.json",
-  // Entry points for checked out resources that may not be on main, but need to version together. These purposefully
-  // live in chipper
-  "include": [
-    // TODO" use a reference just to perennial-alias/tsconfig.json? https://github.com/phetsims/chipper/issues/1469
-    "../../../perennial-alias/js/common/**/*",
-    "../../../perennial-alias/js/import-shared/**/*",
-    "../../../perennial-alias/js/grunt/tasks/util/**/*",
-    "../../../chipper/js/common/**/*",
-    "../../../chipper/js/grunt/**/*",
-    //    "../../../chipper/js/phet-io/**/*",
-    "../../../chipper/js/scripts/**/*",
-    //    "../../../chipper/js/sim-tests/**/*",
-
-    // TODO: split buildjson into a subsection that can be used by this one too (just phet-core?)   // TODO: split buildjson into a subsection that can be used by this one too (just phet-core?)
-    "../../../phet-core/js/types/**/*"
-  ]
+  // Chipper and its node dependencies is what we call "buildtools"
+  "extends": "../../../chipper/tsconfig-node.json"
 }