patch 9.0.1547: Coveralls workflow on CI is commented out

Problem:    Coveralls workflow on CI is commented out.
Solution:   Remove the Coveralls workflow. (closes #12389)
diff --git a/src/version.c b/src/version.c
index a873172..20a6e99 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1547,
+/**/
     1546,
 /**/
     1545,