[commands] Remove eval from the list of sandboxed commands.

NEWS

@@ -46,7 +46,6 @@ lnav v0.8.1:
        - pipe-to
        - pipe-line-to
        - write-*-to
-       - eval
        This makes it easier to run lnav with escalated privileges in restricted
        environments, without the risk of users being able to use the above
        mentioned commands to gain privileged access.

docs/source/commands.rst

@@ -143,7 +143,6 @@ The following options are available:
    environment variable before executing the **lnav** binary:
 
    - open
-   - eval
    - pipe-to
    - pipe-line-to
    - write-*-to

src/lnav_commands.cc

@@ -2241,9 +2241,6 @@ static string com_eval(string cmdline, vector<string> &args)
 
     if (args.empty()) {
 
-    }
-    else if (lnav_data.ld_flags & LNF_SECURE_MODE) {
-        return "error: " + args[0] + " -- unavailable in secure mode";
     }
     else if (args.size() > 1) {
         string all_args = remaining_args(cmdline, args);