Remove empty key definitions from terminfo

They cause less and bat to choke. Issue has already been fixed in
less, but given those two have problems with it, it might be other
programs do to, so remove them to be safe.

See #9416

terminfo/kitty.terminfo

@@ -142,12 +142,8 @@ xterm-kitty|KovIdTTY,
 	kUP5=\E[1;5A,
 	kUP6=\E[1;6A,
 	kUP7=\E[1;7A,
-	ka1=,
-	ka3=,
 	kbeg=\EOE,
 	kbs=\177,
-	kc1=,
-	kc3=,
 	kcbt=\E[Z,
 	kcub1=\EOD,
 	kcud1=\EOB,
@@ -218,7 +214,6 @@ xterm-kitty|KovIdTTY,
 	kf7=\E[18~,
 	kf8=\E[19~,
 	kf9=\E[20~,
-	khlp=,
 	khome=\EOH,
 	kich1=\E[2~,
 	kind=\E[1;2B,
@@ -226,7 +221,6 @@ xterm-kitty|KovIdTTY,
 	knp=\E[6~,
 	kpp=\E[5~,
 	kri=\E[1;2A,
-	kund=,
 	kxIN=\E[I,
 	kxOUT=\E[O,
 	oc=\E]104\007,