Removes piotrs@ from WATCHLIST.

Change-Id: Ib0a76cc5919b1e4242b75180c749a13cf81346a4
Reviewed-on: https://chromium-review.googlesource.com/831371Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Reviewed-by: Piotr Swigon <piotrs@chromium.org>
Commit-Queue: Piotr Swigon <piotrs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524631}

WATCHLISTS

@@ -1610,7 +1610,6 @@
                       'yuzo+watch@chromium.org'],
     'add_to_homescreen': ['dominickn+watch@chromium.org',
                           'hanxi+watch@chromium.org',
-                          'piotrs+watch@chromium.org',
                           'pkotwicz+watch@chromium.org'],
     'android_crash_reporting': ['asvitkine+watch@chromium.org'],
     'android_crazy_linker': ['johnmaguire+watch@google.com'],
@@ -1670,7 +1669,6 @@
                         'peter@chromium.org'],
     'banners': ['dominickn+watch@chromium.org',
                 'hanxi+watch@chromium.org',
-                'piotrs+watch@chromium.org',
                 'pkotwicz+watch@chromium.org'],
     'base': ['vmpstr+watch@chromium.org'],
     'base_allocator': ['dmikurube@chromium.org',
@@ -2040,8 +2038,7 @@
                    'jsbell+idb@chromium.org'],
     'ink_drop': ['bruthig+ink_drop@chromium.org'],
     'input': ['dtapuska+chromiumwatch@chromium.org'],
-    'installable': ['dominickn+watch@chromium.org',
-                    'piotrs+watch@chromium.org'],
+    'installable': ['dominickn+watch@chromium.org'],
     'installer_linux': ['mmoss@chromium.org',
                         'raphael.kubo.da.costa@intel.com'],
     'installer_win': ['grt+watch@chromium.org',