Remove per-language config files #9

Job	Run time
metadata	4s
submodule (brand) / download	12s
submodule (i18n) / download	10s
submodule (brand) / download_unprivileged	0s
submodule (i18n) / download_unprivileged	0s
submodule (mkdocs-material-insiders) / download	13s
submodule (mkdocs-material-insiders) / download_unprivileged	0s
build (es, true) / build	1m 10s
build (fr, true) / build	1m 30s
build (en, false) / build	1m 3s
build (he, true) / build	1m 19s
build (it, true) / build	1m 55s
build (ru, true) / build	1m 7s
build (nl, true) / build	1m 1s
build (zh-Hant, true) / build	1m 3s
build (nl, true) / offline_package	0s
build (en, false) / offline_package	0s
build (zh-Hant, true) / offline_package	0s
build (ru, true) / offline_package	0s
build (es, true) / offline_package	0s
build (he, true) / offline_package	0s
build (fr, true) / offline_package	0s
build (it, true) / offline_package	0s
combine_build	1m 1s
cleanup / cleanup	2s
	11m 50s

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