Remove alancutter@chromium.org from third_party/blink/renderer/core/OWNERS

Blink now uses subdirectory owners, I am listed in the subdirectories
I have history with. I don't know Blink very well outside of those
directories.

Change-Id: I735cc7e7173e8dd90ec036a77562736f3258e178
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2397064
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Reviewed-by: dstockwell <dstockwell@google.com>
Commit-Queue: dstockwell <dstockwell@google.com>
Cr-Commit-Position: refs/heads/master@{#806008}

third_party/blink/renderer/core/OWNERS

@@ -2,8 +2,6 @@
 # For example, core/rendering/OWNERS for rendering changes.
 
 # Reviewers (comments indicate areas of expertise):
-# alancutter reviews changes in core/animation, core/css and core/style.
-alancutter@chromium.org
 alexis.menard@intel.com
 # bokan reviews changes around viewport behavior, scrolling, cc/blink interaction, co-ordinate spaces and input events
 bokan@chromium.org