MINOR: pattern: Remove the flag "PAT_F_FROM_FILE".

This flag is no longer used. The last place using this, are the display
of the result of pattern matching in the cli command "get map" or "get
acl".

The first parameter of this command is the reference of the file used to
perform the lookup.
diff --git a/include/types/pattern.h b/include/types/pattern.h
index bf13bf7..839eae6 100644
--- a/include/types/pattern.h
+++ b/include/types/pattern.h
@@ -64,8 +64,7 @@
 /* possible flags for expressions or patterns */
 enum {
 	PAT_F_IGNORE_CASE = 1 << 0,       /* ignore case */
-	PAT_F_FROM_FILE   = 1 << 1,       /* pattern comes from a file */
-	PAT_F_TREE        = 1 << 2,       /* some patterns are arranged in a tree */
+	PAT_F_TREE        = 1 << 1,       /* some patterns are arranged in a tree */
 };
 
 /* ACL match methods */