Remove enterprise leftovers from community

apps/ui/css/login.css

@@ -197,38 +197,6 @@
 .login-divider-line { flex: 1; height: 1px; background: var(--border); }
 .login-divider-text { font-size: 11.5px; color: var(--text-muted); white-space: nowrap; }
 
-.btn-sso {
-  width: 100%;
-  padding: 9px;
-  background: var(--bg-overlay);
-  color: var(--text-secondary);
-  border: 1px solid var(--border);
-  border-radius: 7px;
-  font-family: 'Inter', sans-serif;
-  font-size: 13.5px;
-  font-weight: 500;
-  cursor: pointer;
-  transition: all 0.15s;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 9px;
-}
-
-.btn-sso:hover { background: var(--bg-muted); color: var(--text-primary); }
-
-.btn-sso:disabled {
-  cursor: not-allowed;
-  opacity: 0.7;
-  background: var(--bg-overlay);
-  color: var(--text-muted);
-}
-
-.btn-sso:disabled:hover {
-  background: var(--bg-overlay);
-  color: var(--text-muted);
-}
-
 .login-inline-badge {
   display: inline-flex;
   align-items: center;