bcr: remove non-google maintainer #5

Job	Run time
build	9m 21s
package (windows-2022, x64_windows, dist_zip)	15m 28s
package (macos-14-large, darwin_x86_64, dist_zip)	3s
package (windows-2022, x64_x86_windows, dist_zip)	14m 50s
package (macos-14, darwin_arm64, dist_zip)	8m 32s
	48m 14s

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