Reclassify heapsnapshot and nsJSInspector as not part of devtools

This resolves Issue #316

devtools/shared/heapsnapshot/tests/unit/test_HeapAnalyses_takeCensus_05.js

@@ -1,44 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-// Test that the HeapAnalyses{Client,Worker} can take censuses and return
-// a CensusTreeNode.
-
-function run_test() {
-  run_next_test();
-}
-
-const BREAKDOWN = {
-  by: "internalType",
-  then: { by: "count", count: true, bytes: true }
-};
-
-add_task(function* () {
-  const client = new HeapAnalysesClient();
-
-  const snapshotFilePath = saveNewHeapSnapshot();
-  yield client.readHeapSnapshot(snapshotFilePath);
-  ok(true, "Should have read the heap snapshot");
-
-  const { report } = yield client.takeCensus(snapshotFilePath, {
-    breakdown: BREAKDOWN
-  });
-
-  const { report: treeNode } = yield client.takeCensus(snapshotFilePath, {
-    breakdown: BREAKDOWN
-  }, {
-    asTreeNode: true
-  });
-
-  ok(treeNode.children.length > 0, "treeNode has children");
-  ok(treeNode.children.every(type => {
-    return "name" in type &&
-           "bytes" in type &&
-           "count" in type;
-  }), "all of tree node's children have name, bytes, count");
-
-  compareCensusViewData(BREAKDOWN, report, treeNode,
-    "Returning census as a tree node represents same data as the report");
-
-  client.destroy();
-});