[owners] Remove scroggo@google.com from libs/shaders/OWNERS

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Change-Id: I9f03588b566d1ff53f3d17a0ce58a476859ca168

Author: Owner Cleanup Bot

libs/shaders/OWNERS

@@ -1,4 +1,3 @@
 alecmouri@google.com
 jreck@google.com
 sallyqi@google.com
-scroggo@google.com