ktest: Remove unused functions

After the rewrite of the config bisect, there were several unused
functions that can be removed.

One of the unused functions printed out the failed config nicer than
what the rewrite did, so I kept that and used it to output the
bad config.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -2807,27 +2807,6 @@ sub process_config_ignore {
     assign_configs \%config_ignore, $config;
 }
 
-sub read_current_config {
-    my ($config_ref) = @_;
-
-    %{$config_ref} = ();
-    undef %{$config_ref};
-
-    my @key = keys %{$config_ref};
-    if ($#key >= 0) {
-	print "did not delete!\n";
-	exit;
-    }
-    open (IN, "$output_config");
-
-    while (<IN>) {
-	if (/^(CONFIG\S+)=(.*)/) {
-	    ${$config_ref}{$1} = $2;
-	}
-    }
-    close(IN);
-}
-
 sub get_dependencies {
     my ($config) = @_;
 
@@ -2947,23 +2926,6 @@ sub run_config_bisect_test {
     return run_bisect_test $type, "oldconfig";
 }
 
-sub process_passed {
-    my (%configs) = @_;
-
-    doprint "These configs had no failure: (Enabling them for further compiles)\n";
-    # Passed! All these configs are part of a good compile.
-    # Add them to the min options.
-    foreach my $config (keys %configs) {
-	if (defined($config_list{$config})) {
-	    doprint " removing $config\n";
-	    $config_ignore{$config} = $config_list{$config};
-	    delete $config_list{$config};
-	}
-    }
-    doprint "config copied to $outputdir/config_good\n";
-    run_command "cp -f $output_config $outputdir/config_good";
-}
-
 sub process_failed {
     my ($config) = @_;
 
@@ -3066,7 +3028,7 @@ sub run_config_bisect {
     if (!$runtest && $len_diff > 0) {
 
 	if ($len_diff == 1) {
-	    doprint "The bad config setting is: $diff_arr[0]\n";
+	    process_failed $diff_arr[0];
 	    return 1;
 	}
 	my %tmp_config = %bad_configs;
@@ -3471,29 +3433,6 @@ sub read_depends {
     read_kconfig($kconfig);
 }
 
-sub read_config_list {
-    my ($config) = @_;
-
-    open (IN, $config)
-	or dodie "Failed to read $config";
-
-    while (<IN>) {
-	if (/^((CONFIG\S*)=.*)/) {
-	    if (!defined($config_ignore{$2})) {
-		$config_list{$2} = $1;
-	    }
-	}
-    }
-
-    close(IN);
-}
-
-sub read_output_config {
-    my ($config) = @_;
-
-    assign_configs \%config_ignore, $config;
-}
-
 sub make_new_config {
     my @configs = @_;