Remove some CFLAGS from $Config

Makefile.PL

BEGIN {                                                                                                                                                                                                                                      
    require Config;                                                                                                                                                                                                                          
    if (tied %Config::Config) { eval {                                                                                                                                                                                                       
        for (keys %Config::Config) {                                                                                                                                                                                                         
            local *Config::STORE = sub {                                                                                                                                                                                                     
                my($self, $key, $value) = @_;                                                                                                                                                                                                
                $value =~ s{'}{}sg;#'                                                                                                                                                                                                        
                my $start = index($Config::Config_SH_expanded, "\n$key=\'");                                                                                                                                                                 
                return undef if $start == -1;                                                                                                                                                                                                
                $start += length($key) + 3;                                                                                                                                                                                                  
                substr($Config::Config_SH_expanded, $start, index($Config::Config_SH_expanded, "'\n", $start) - $start) = defined $value ? $value : 'undef';                                                                                 
                delete $self->{$key};                                                                                                                                                                                                        
            };                                                                                                                                                                                                                               
            if ($Config::Config{$_} =~ m{-Wdeclaration-after-statement}) {                                                                                                                                                                   
                $Config::Config{$_} =~ s{-Wdeclaration-after-statement }{}sg;                                                                                                                                                                
                print "$_: $Config::Config{$_}";                                                                                                                                                                                             
            }                                                                                                                                                                                                                                
            #$cf{$_} = $Config{$_} if /flags/;                                                                                                                                                                                               
        }                                                                                                                                                                                                                                    
    } }                                                                                                                                                                                                                                      
    warn if $@;                                                                                                                                                                                                                              
}                                                                                                                                                                                                                                            
use ExtUtils::MakeMaker;