Revert "Tools: Add SVGO, an SVG optimizer to pre-commit hook"

Resulting SVGs are misdetected ad served as application/xml, see Ie4db624ba9f561a467622878d0992847be018b7d

This reverts commit 3e944d795e2f4b7809791e6560cc3acfa0d234cb.

Change-Id: Ieeb5c97652b001e31f41cf2593a47a1bb4accc7f
Merge "Revert "Tools: Add SVGO, an SVG optimizer to pre-commit hook""