Fixed: Remove other unneeded gitattributes

Co-Authored-By: taloth <taloth@users.noreply.github.com>

.gitattributes

@@ -6,19 +6,4 @@
 
 # Custom for Visual Studio
 *.cs     diff=csharp
-*.sln    merge=union
-*.vbproj merge=union
-*.fsproj merge=union
-*.dbproj merge=union
-
-# Standard to msysgit
-*.doc   diff=astextplain
-*.DOC   diff=astextplain
-*.docx diff=astextplain
-*.DOCX diff=astextplain
-*.dot  diff=astextplain
-*.DOT  diff=astextplain
-*.pdf  diff=astextplain
-*.PDF   diff=astextplain
-*.rtf   diff=astextplain
-*.RTF   diff=astextplain 
+*.sln    merge=union