termux-tools: remove check for /system/bin/killall

/system/bin/killall should be present on all devices running Android 7.0+.

packages/termux-tools/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://termux.com/
 TERMUX_PKG_DESCRIPTION="Basic system tools for Termux"
 TERMUX_PKG_LICENSE="GPL-3.0"
 TERMUX_PKG_VERSION=0.81
-TERMUX_PKG_REVISION=2
+TERMUX_PKG_REVISION=3
 TERMUX_PKG_SKIP_SRC_EXTRACT=true
 TERMUX_PKG_PLATFORM_INDEPENDENT=true
 TERMUX_PKG_ESSENTIAL=true

packages/termux-tools/termux-reset

@@ -39,7 +39,7 @@ else
 	/system/bin/rm -rf "@TERMUX_PREFIX@"
 	echo "Done. You need to close Termux application now."
 
-	if ! $HAS_TERMUX_AM && [ -x "/system/bin/killall" ]; then
+	if ! $HAS_TERMUX_AM; then
 		echo "Terminating all sessions..."
 		/system/bin/killall -9 "$SHELL"
 	else