[PATCH v1 5/8] toradex: common: Remove stale function declaration

[sbabic at denx.de]

> Remove stale show_boot_logo() declaration, not used anywhere.
> Fixes: e6fd30dd9eef ("toradex: drop legacy show_boot_logo function and use splashscreen")
> Signed-off-by: Francesco Dolcini <francesco.dolcini at toradex.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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