Reclassify heapsnapshot and nsJSInspector as not part of devtools

This resolves Issue #316

devtools/moz.build

@@ -4,20 +4,14 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+DIRS += [
+    'server',
+    'shared',
+]
+
 if CONFIG['MOZ_DEVTOOLS']:
     DIRS += ['client']
 
-if CONFIG['MOZ_DEVTOOLS_SERVER']:
-    DIRS += [
-        'server',
-        'shared',
-    ]
-else:
-  DIRS += [
-      'shared/heapsnapshot',
-      'shared/jsinspector',
-  ]
-
 # /browser uses DIST_SUBDIR.  We opt-in to this treatment when building
 # DevTools for the browser to keep the root omni.ja slim for use by external XUL
 # apps.  Mulet also uses this since it includes /browser.