[hackers] [st] Revert "Add bold off SGR" || Quentin Rameau

[git]

commit 8dacdfbab1c476063a31bc3b8d7222ac2b70ff66
Author:     Quentin Rameau <quinq@fifth.space>
AuthorDate: Tue Jul 11 23:16:25 2017 +0200
Commit:     Quentin Rameau <quinq@fifth.space>
CommitDate: Wed Jul 12 13:29:31 2017 +0200

    Revert "Add bold off SGR"
    
    This reverts commit 6cb6d61525931c88971cce323f63e40451a6d365.
    This wasn't a useful thing after all.

diff --git a/st.c b/st.c
index 8d4a9f2..ae93ade 100644
--- a/st.c
+++ b/st.c
@@ -1402,9 +1402,6 @@ tsetattr(int *attr, int l)
                case 9:
                        term.c.attr.mode |= ATTR_STRUCK;
                        break;
-               case 21:
-                       term.c.attr.mode &= ~ATTR_BOLD;
-                       break;
                case 22:
                        term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
                        break;