in keys_charname.xml
<key name="Key0" action="run_shortcut" params="09"/>
<key name="Key0" ctrl="1" action="select_shortcut_bar" params="10"/>
<key name="Key0" shift="1" action="run_shortcut" params="19"/>
<key name="Key0" menu="1" action="talk_message" params="09"/>
The last line is the one you want to delete. There are, of course, similar lines for the other number keys.
I also suspect that if you assign Alt+1 to another action that it will overwrite that line with the new action. It certainly does that with other key assignments.
<key name="Key0" action="run_shortcut" params="09"/>
<key name="Key0" ctrl="1" action="select_shortcut_bar" params="10"/>
<key name="Key0" shift="1" action="run_shortcut" params="19"/>
<key name="Key0" menu="1" action="talk_message" params="09"/>
The last line is the one you want to delete. There are, of course, similar lines for the other number keys.
I also suspect that if you assign Alt+1 to another action that it will overwrite that line with the new action. It certainly does that with other key assignments.
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Remembering Tyneetryk
Phaedreas Tears - 15 years old and first(*) of true neutral guilds in Atys.
(*) This statement is contested, but we are certainly the longest lasting.
<clowns | me & you | jokers>