chore: remove test artifacts from tracking

tmp_hosts_list_test/comments_only.txt

@@ -1,2 +0,0 @@
-# Just comments
-# Nothing else

tmp_hosts_list_test/invalid.txt

@@ -1,4 +0,0 @@
-not a valid line
-also not valid
-45.155.204.190 chatgpt.com
-valid.com 1.2.3.4

tmp_hosts_list_test/test_hosts.txt

@@ -1,11 +0,0 @@
-# This is a comment
-127.0.0.1 localhost
-localhost 127.0.0.1
-45.155.204.190 chatgpt.com
-45.155.204.190 ab.chatgpt.com
-0.0.0.0 ad.doubleclick.net
-0.0.0.0 tracker.example.com
-
-# IPv6
-::1 localhost
-fe80::1 host.local

tmp_test.uc

@@ -1,10 +0,0 @@
-#!/usr/bin/env ucode
-let fs = require("fs");
-function as_string(value) { return value == null ? "" : "" + value; }
-let cmd = "wget -q -O /tmp/test_uc_dl.txt --timeout=15 https://raw.githubusercontent.com/AvenCores/Unlock_AI_and_EN_Services_for_Russia/main/source/system/etc/hosts";
-print("Running wget...\n");
-let result = system(cmd);
-print("system result: ", as_string(result), "\n");
-let st = fs.stat("/tmp/test_uc_dl.txt");
-print("file exists: ", as_string(st != null), "\n");
-if (st != null) print("file size: ", as_string(st.size), "\n");

tmp_test2.uc

@@ -1,21 +0,0 @@
-#!/usr/bin/env ucode
-let fs = require("fs");
-function as_string(value) { return value == null ? "" : "" + value; }
-function shell_quote(value) { return "'" + replace(as_string(value), /'/g, "'\\''") + "'"; }
-
-print("Test 1: direct system()\n");
-let r1 = system("wget -q -O /tmp/t1.txt --timeout=15 https://raw.githubusercontent.com/AvenCores/Unlock_AI_and_EN_Services_for_Russia/main/source/system/etc/hosts");
-print("system result: ", as_string(r1), "\n");
-let s1 = fs.stat("/tmp/t1.txt");
-print("file exists: ", as_string(s1 != null), "\n");
-
-print("\nTest 2: via shell_quote\n");
-let url = "https://raw.githubusercontent.com/AvenCores/Unlock_AI_and_EN_Services_for_Russia/main/source/system/etc/hosts";
-let output = "/tmp/t2.txt";
-let cmd = "wget -q -O " + shell_quote(output) + " --timeout=30 " + shell_quote(url);
-print("cmd: ", cmd, "\n");
-let r2 = system(cmd);
-print("system result: ", as_string(r2), "\n");
-let s2 = fs.stat("/tmp/t2.txt");
-print("file exists: ", as_string(s2 != null), "\n");
-if (s2 != null) print("size: ", as_string(s2.size), "\n");