Revert "Merge pull request #8282 from rfourquet/docs-linalg"

This reverts commit df944dc85924d02b8e76dc7816530090a071d3ae, reversing
changes made to ff10ed451b1b295d40e4eee88e25db0d4b14748f.
Merge pull request #8285 from JuliaLang/anj/revert

Revert "Merge pull request #8282 from rfourquet/docs-linalg"