update .gitattributes: remove LFS tracking for .dll/.pdb/.ipch/.sdf/.db

.gitattributes

@@ -1,5 +1,3 @@
 *.ipch filter=lfs diff=lfs merge=lfs -text
 *.db filter=lfs diff=lfs merge=lfs -text
-*.pdb filter=lfs diff=lfs merge=lfs -text
-*.dll filter=lfs diff=lfs merge=lfs -text
 *.sdf filter=lfs diff=lfs merge=lfs -text