matomo: fix quoting in cleanup shell script

PL-133012

Author: Philipp Neumann

nixos/services/matomo/matomo-delete-unwanted-files.sh

@@ -193,7 +193,7 @@ files=(\
   "/var/lib/matomo/share/node_modules/angular-sanitize/index.js"\
 )
 
-for file in "''${files[@]}";do
+for file in "${files[@]}";do
   if [ -f "$file" ]; then
     rm -v "$file"
   fi
@@ -214,7 +214,7 @@ directories=(\
   "/var/lib/matomo/share/vendor/symfony/monolog-bridge/Symfony"\
 )
 
-for dir in "''${directories[@]}";do
+for dir in "${directories[@]}";do
   if [ -d "$dir" ]; then
     rm -Rvf "$dir"
   fi