Drop Bitstream Vera fonts from 60-latin.conf

Bitstream Vera fonts seems broken so dropped them there.

Fixes https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/26
diff --git a/conf.d/60-latin.conf b/conf.d/60-latin.conf
index acdca25..25ea40f 100644
--- a/conf.d/60-latin.conf
+++ b/conf.d/60-latin.conf
@@ -5,7 +5,6 @@
 	<alias>
 		<family>serif</family>
 		<prefer>
-			<family>Bitstream Vera Serif</family>
 			<family>DejaVu Serif</family>
 			<family>Times New Roman</family>
 			<family>Thorndale AMT</family>
@@ -18,7 +17,6 @@
 	<alias>
 		<family>sans-serif</family>
 		<prefer>
-			<family>Bitstream Vera Sans</family>
 			<family>DejaVu Sans</family>
 			<family>Verdana</family>
 			<family>Arial</family>
@@ -35,7 +33,6 @@
 	<alias>
 		<family>monospace</family>
 		<prefer>
-			<family>Bitstream Vera Sans Mono</family>
 			<family>DejaVu Sans Mono</family>
 			<family>Inconsolata</family>
 			<family>Andale Mono</family>