Revert "add the *.VC.db to unreal engine ignore"

This reverts commit 548fb984f7173dea0fbd572ef0ef3784019100c0.

UnrealEngine.gitignore

@@ -1,9 +1,6 @@
 # Visual Studio 2015 user specific files
 .vs/
 
-# Visual Studio 2015 database file
-*.VC.db
-
 # Compiled Object files
 *.slo
 *.lo