Revert "Ignore generated example binaries (#1884)" (#1946)

This reverts commit 4a01139c8d87584b7d62a2c7d60b151d6be5ee9c.

.gitignore

@@ -1,11 +1,6 @@
 # Ignore generated files
 # ...
 
-# Ignore all without extensions
-*
-!*.*
-!*/
-
 # Ignore VIM's backup generated files
 *.swp
 *.swo