Remove `TF_FF_AUTO_APPROVE_APPLY` feature flag

This feature flag is now always enabled.

Changelog: removed

src/gitlab-tofu.sh

@@ -15,10 +15,6 @@ if [ -z "$TF_FF_AUTO_URLENCODE_STATE_NAME" ]; then
   TF_FF_AUTO_URLENCODE_STATE_NAME=true
 fi
 
-if [ -z "$TF_FF_AUTO_APPROVE_APPLY" ]; then
-  TF_FF_AUTO_APPROVE_APPLY=true
-fi
-
 # Helpers
 
 # Evaluate if this script is being sourced or executed directly.
@@ -211,17 +207,12 @@ if [ $sourced -eq 0 ]; then
 
   case "${1}" in
     "apply")
-      auto_approve_args=""
-      if [ "${TF_FF_AUTO_APPROVE_APPLY}" = true ]; then
-        auto_approve_args="-auto-approve"
-      fi
-
       $TF_IMPLICIT_INIT && terraform_init
       if [ "$TF_APPLY_NO_PLAN" = false ]; then
-        tofu "${TF_CHDIR_OPT}" "${@}" -input=false "${auto_approve_args}" "${TF_PLAN_CACHE}"
+        tofu "${TF_CHDIR_OPT}" "${@}" -input=false -auto-approve "${TF_PLAN_CACHE}"
       else
         # shellcheck disable=SC2086
-        tofu "${TF_CHDIR_OPT}" "${@}" -input=false "${auto_approve_args}" ${var_file_args}
+        tofu "${TF_CHDIR_OPT}" "${@}" -input=false -auto-approve ${var_file_args}
       fi
     ;;
     "destroy")