Revert "install_deps.sh: fix ffmpeg package installation on Arch"

This reverts commit 3cb212602c.

The root cause was IFS being set incorrectly.

build_files/build_environment/install_deps.sh

@@ -993,13 +993,6 @@ download() {
   fi
 }
 
-string_trim() {
-    local var="$*"
-    var="${var#"${var%%[![:space:]]*}"}" # Leading.
-    var="${var%"${var##*[![:space:]]}"}" # Trailing.
-    echo -n "$var"
-}
-
 # Return 0 if $1 = $2 (i.e. 1.01.0 = 1.1, but 1.1.1 != 1.1), else 1.
 # $1 and $2 should be version numbers made of numbers only.
 version_eq() {
@@ -4760,8 +4753,6 @@ print_info_ffmpeglink() {
     _packages="$_packages $OPENJPEG_DEV"
   fi
 
-  _packages="$(string_trim $_packages)"
-
   if [ "$DISTRO" = "DEB" ]; then
     print_info_ffmpeglink_DEB
   elif [ "$DISTRO" = "RPM" ]; then