Reclassify heapsnapshot and nsJSInspector as not part of devtools

This resolves Issue #316

devtools/shared/heapsnapshot/tests/unit/test_census-tree-node-10.js

@@ -1,43 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-"use strict";
-
-/**
- * Test when multiple leaves in the census report map to the same node in an
- * inverted CensusReportTree.
- */
-
-function run_test() {
-  const BREAKDOWN = {
-    by: "coarseType",
-    objects: {
-      by: "objectClass",
-      then: { by: "count", count: true, bytes: true },
-    },
-    other: {
-      by: "internalType",
-      then: { by: "count", count: true, bytes: true },
-    },
-    strings: { by: "count", count: true, bytes: true },
-    scripts: { by: "count", count: true, bytes: true },
-  };
-
-  const REPORT = {
-    objects: {
-      Array: { count: 1, bytes: 10 },
-    },
-    other: {
-      Array: { count: 1, bytes: 10 },
-    },
-    strings: { count: 0, bytes: 0 },
-    scripts: { count: 0, bytes: 0 },
-  };
-
-  const node = censusReportToCensusTreeNode(BREAKDOWN, REPORT, { invert: true });
-
-  equal(node.children[0].name, "Array");
-  equal(node.children[0].reportLeafIndex.size, 2);
-  dumpn(`node.children[0].reportLeafIndex = ${[...node.children[0].reportLeafIndex]}`);
-  ok(node.children[0].reportLeafIndex.has(2));
-  ok(node.children[0].reportLeafIndex.has(6));
-}