awk refuses to use a2p (#524)

* My Linux system has perl 5.32.1, and I installed App::a2p under it using cpanm
* Now my system has /usr/local/bin/a2p command available
* I built a newer version of perl; now one perl has App::a2p and the other doesn't
* This version of awk does not use App::a2p, it only runs the command a2p
* The SANITY check was not sane in my case because both perls are able to run a2p, but the awk wrapper refuses on one perl because of App::a2p check
* Delete the SANITY code; there is already a check if a2p failed to run so this is good enough
* Also remove the too-helpful error check for long options; users will still see "unknown flag" error which unambiguously states that the option can't be used

bin/awk

@@ -17,12 +17,6 @@ License: perl
 
 use strict;
 
-SANITY: {
-	my $external_module = 'App::a2p';
-	my $rc = eval "require $external_module; $external_module->import; 1";
-	die "This program needs the $external_module module.\n" unless $rc;
-	}
-
 my(
     $program,		# the code to eval
     $tmpin, 		# the files a2p reads
@@ -81,11 +75,6 @@ while (@ARGV) {
 	    push(@nargs, $_);
 	    last;
 	}
-	elsif (s/^-//) {
-	    if (length) { usage("Long options not supported") }
-	    shift;
-	    next;
-	}
 	else {
 	    usage("unknown flag: -$_");
 	}