Remove pdr from blink_layout WATCHLIST

Optimizing email

Change-Id: I8d3bc4c77a10022f29d68fbcdb91c6f88327009d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1842952
Auto-Submit: Philip Rogers <pdr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703515}

WATCHLISTS

@@ -2095,7 +2095,6 @@
     'blink_layers': ['blink-layers+watch@chromium.org'],
     'blink_layout': ['blink-reviews-layout@chromium.org',
                      'eae+blinkwatch@chromium.org',
-                     'pdr+renderingwatchlist@chromium.org',
                      'szager+layoutwatch@chromium.org',
                      'zoltan@webkit.org'],
     'blink_layout_ng': ['cbiesinger@chromium.org',