RewriteEngine On
RewriteRule (.*)\.html/$ /$1 [R=301,L]
Eğer olmazsa;

RewriteEngine On
RewriteRule (.*)\.html/\$ /$1 [R=301,L]
Yine olmazsa;

RewriteEngine On
RewriteRule (.*)\.html/ /$1 [R=301,L]