patch 8.2.1143: Vim9: return type of remove() is any

Problem:    Vim9: return type of remove() is any.
Solution:   Use the member type of the first argument, if known.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 65c34cd..83b878b 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -382,6 +382,17 @@
     return &t_any;
 }
 
+    static type_T *
+ret_remove(int argcount UNUSED, type_T **argtypes)
+{
+    if (argtypes[0]->tt_type == VAR_LIST
+	    || argtypes[0]->tt_type == VAR_DICT)
+	return argtypes[0]->tt_member;
+    if (argtypes[0]->tt_type == VAR_BLOB)
+	return &t_number;
+    return &t_any;
+}
+
 static type_T *ret_f_function(int argcount, type_T **argtypes);
 
 /*
@@ -827,7 +838,7 @@
     {"remote_read",	1, 2, FEARG_1,	  ret_string,	f_remote_read},
     {"remote_send",	2, 3, FEARG_1,	  ret_string,	f_remote_send},
     {"remote_startserver", 1, 1, FEARG_1, ret_void,	f_remote_startserver},
-    {"remove",		2, 3, FEARG_1,	  ret_any,	f_remove},
+    {"remove",		2, 3, FEARG_1,	  ret_remove,	f_remove},
     {"rename",		2, 2, FEARG_1,	  ret_number,	f_rename},
     {"repeat",		2, 2, FEARG_1,	  ret_first_arg, f_repeat},
     {"resolve",		1, 1, FEARG_1,	  ret_string,	f_resolve},