Backed out 2 changesets (bug 1437081, bug 1398179) permafailing at web-platform/runtests.py on a CLOSED TREE

Backed out changeset 5bd73dd9739e (bug 1437081)
Backed out changeset 8b0c4930429a (bug 1398179)

testing/web-platform/meta/preload/link-header-preload-delay-onload.html.ini

@@ -1,3 +0,0 @@
-[link-header-preload-delay-onload.html]
-  disabled:
-    if (os == "linux"): https://bugzilla.mozilla.org/show_bug.cgi?id=1437081

testing/web-platform/meta/service-workers/service-worker/clients-get-cross-origin.https.html.ini

@@ -1,4 +0,0 @@
-[clients-get-cross-origin.https.html]
-  disabled:
-    if debug && (os == "linux"): https://bugzilla.mozilla.org/show_bug.cgi?id=1398179
-    if debug && (os == "mac"): https://bugzilla.mozilla.org/show_bug.cgi?id=1398179