Backed out changeset 10b4ace1f119 (bug 1665415) for breaking about:support in upcoming 82 beta (bug 1665961).

code to list experimental features assumes preference controlling it is
available but javascript.options.warp only exists in Nightly.

toolkit/components/featuregates/Features.toml

@@ -176,12 +176,3 @@ preference = "apz.allow_zooming"
 type = "boolean"
 bug-numbers = [1245183]
 is-public = true
-
-[js-warp]
-title = "experimental-features-js-warp"
-description = "experimental-features-js-warp-description"
-restart-required = true
-preference = "javascript.options.warp"
-type = "boolean"
-bug-numbers = [1613592]
-is-public = true

toolkit/locales/en-US/toolkit/featuregates/features.ftl

@@ -103,8 +103,3 @@ experimental-features-devtools-serviceworker-debugger-support-description = Enab
 experimental-features-graphics-desktop-zooming =
     .label = Graphics: Smooth Pinch Zoom
 experimental-features-graphics-desktop-zooming-description = Enable support for smooth pinch zooming on touchscreens and precision touch pads.
-
-# JS JIT Warp project
-experimental-features-js-warp =
-    .label = JavaScript JIT: Warp
-experimental-features-js-warp-description = Enable Warp, a project to improve JavaScript performance and memory usage.