Remove the WebXR dependency on ancient time@0.1 crate (#32862)

`webxr` depends on a very old verison of `time`, which allowed serializing
monotonic clock output. This isn't possible on all platforms, so newer
versions of `time` do not allow this. In order to stop using the old
0.1 versions of `time` we have to stop relying on times passed from `webxr`
to Servo. This change does that, at the cost of removing the XR
profiling feature. It has to be rewritten in another way in the `webxr`
crate.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

Cargo.lock

@@ -644,7 +644,6 @@ dependencies = [
  "style",
  "style_traits",
  "surfman",
- "time 0.1.45",
  "unicode-script",
  "webrender",
  "webrender_api",
@@ -670,7 +669,6 @@ dependencies = [
  "servo_config",
  "sparkle",
  "style",
- "time 0.1.45",
  "webrender_api",
  "webxr-api",
 ]
@@ -7382,7 +7380,6 @@ dependencies = [
  "ipc-channel",
  "log",
  "serde",
- "time 0.1.45",
 ]
 
 [[package]]