[gnumeric] Doc fix.

[Morten Welinder <mortenw src gnome org>]

commit 880841c3cf1b2a77b2c99d1b067e8dceb952ff0c
Author: Morten Welinder <terra gnome org>
Date:   Sun Jun 28 22:18:37 2020 -0400

    Doc fix.
    
    Argument type 'a' doesn't exist, so don't document it.

 src/func.h | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/func.h b/src/func.h
index 29b8dfdc9..8680ed16e 100644
--- a/src/func.h
+++ b/src/func.h
@@ -56,7 +56,6 @@ GnmFuncGroup *gnm_func_group_fetch (char const *name,
  * Without intersection or iteration support
  *     r : cell range  content is _NOT_ guaranteed to have been evaluated yet
  *     A : area        either range or array (as above)
- *     a : array
  *     ? : anything
  *
  *  For optional arguments do: