api: remove_repofile_if_unused set default to not in use

also don't pipe output to null anymore as the function does not output anything by default

api

@@ -279,6 +279,9 @@ remove_repofile_if_unused() { #Given a sources.list.d file, delete it if nothing
   [ -z "$file" ] && error "remove_repo_if_unused: no sources.list.d file specified!"
   #return now if the list file does not exist
   [ -f "$file" ] || return 0
+
+  #set default to not in use
+  local in_use=0
 
   if [ "${file##*.}" == "list" ]; then
     # determine what uri, suite, and components are in a file
@@ -291,14 +294,14 @@ remove_repofile_if_unused() { #Given a sources.list.d file, delete it if nothing
       local IFS=' '
       if [ -z "$components" ]; then
         debug "$uri $suite"
-        if anything_installed_from_uri_suite_component "$uri" "$suite" >/dev/null;then
+        if anything_installed_from_uri_suite_component "$uri" "$suite";then
           in_use=1
           break 1
         fi
       else
         for component in $components ;do
           debug "$uri $suite $component"
-          if anything_installed_from_uri_suite_component "$uri" "$suite" "$component" >/dev/null;then
+          if anything_installed_from_uri_suite_component "$uri" "$suite" "$component";then
             in_use=1
             break 2
           fi
@@ -335,14 +338,14 @@ remove_repofile_if_unused() { #Given a sources.list.d file, delete it if nothing
       for suite in $suites ;do
         if [ -z "$components" ]; then
           debug "$uri $suite"
-          if anything_installed_from_uri_suite_component "$uri" "$suite" >/dev/null;then
+          if anything_installed_from_uri_suite_component "$uri" "$suite";then
             in_use=1
             break 2
           fi
         else
           for component in $components ;do
             debug "$uri $suite $component"
-            if anything_installed_from_uri_suite_component "$uri" "$suite" "$component" >/dev/null;then
+            if anything_installed_from_uri_suite_component "$uri" "$suite" "$component";then
               in_use=1
               break 3
             fi