tf_fuzz: Minor improvements/fixes in TF-Fuzz

Problems corrected related to failing to deallocate resources
created over the course of a test, and to incorrect accounting for
variables when using statement-level randomization (i.e., the <n>
to <m> of {} and shuffle options).  Also removed several inter-
mediate files that should not have commited in the first place.

Change-Id: I0582cbfddb70563a071fee0cb9aaf2547876d051
diff --git a/tf_fuzz/utility/gibberish.cpp b/tf_fuzz/utility/gibberish.cpp
index 58a3f8f..6de56f0 100644
--- a/tf_fuzz/utility/gibberish.cpp
+++ b/tf_fuzz/utility/gibberish.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -189,7 +189,7 @@
 gibberish::gibberish (void)
 {
     string holder;
-    
+
     for (int i = 0;  i < n_avoids;  i++) {
         holder = avoid[i];
         for (long unsigned int j = 0;  j < holder.length();  j++) {