Edit the %CMDER_ROOT%\bin\vscode_init_args.cmd file, navigate to the bottom and change 1 to 0 in both of the set verbose_output=1 statements.

Example:

if defined CMDER_CONFIGURED (
    rem Set Cmder settings here for when VSCode is launched inside Cmder.
    set verbose_output=0
) else (
    rem Set Cmder settings here for when VSCode is launched from outside Cmder.
    set verbose_output=0
)

Then, please also add a rem before both echo Applying Cmder VSCode settings lines in vscode_init_args.cmd as well:

rem echo Applying Cmder VSCode settings from '%~0'...

and

rem echo Applying Cmder VSCode settings is complete!