gen_merge_report.sh: remove utils.sh script source call

The script gen_merge_report.sh is self-contained and does not required
any variable/function from utils.sh script.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I01de6efe7b481ed7efc095f6a4c1cb19e6ee7451
diff --git a/script/gen_merge_report.sh b/script/gen_merge_report.sh
index 9967ed6..68ee2d2 100644
--- a/script/gen_merge_report.sh
+++ b/script/gen_merge_report.sh
@@ -5,7 +5,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-source $CI_ROOT/utils.sh
 REPORT_JSON=$1
 REPORT_HTML=$2
 TEST_DEF_FOLDER="${WORKSPACE}/test-definitions"