fix(tf-coverity): remove stale file from ignore list

The "io_dummy" driver was removed from TF-A source tree a few months
ago [1]. Thus, remove its source file from Coverity's list of files to
ignore.

[1] TF-A commit 63e0b865382eb82 "chore(io): remove io_dummy driver"

Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Change-Id: Ic8a8bf8e18495d47242b03532d3eb0c29bd64a4a
diff --git a/script/tf-coverity/coverity_tf_conf.py b/script/tf-coverity/coverity_tf_conf.py
index 6d67aa8..e589611 100644
--- a/script/tf-coverity/coverity_tf_conf.py
+++ b/script/tf-coverity/coverity_tf_conf.py
@@ -108,9 +108,6 @@
     # Exclude the following files used for STM32MP host tools (cert_create)
     ("plat/st/stm32mp1/stm32mp1_tbb_cert.c", "Used to build STM32MP cert_create"),
 
-    # Exclude the IO files
-    ("drivers/io/io_dummy.c", "None of the upstream platforms using this file"),
-
     # Exclude The following files used to wrap external test code
     ("plat/arm/board/tc/rss_ap_test_stubs.c", "Only used for testing on arm/tc platform"),
     ("plat/arm/board/tc/rss_ap_tests.c", "Only used for testing on arm/tc platform"),