Revert timeout

Author: ksss

Gemfile

@@ -48,7 +48,6 @@ gem "net-smtp"
 gem 'csv'
 gem 'ostruct'
 gem 'pstore'
-gem "timeout"
 
 group :minitest do
   gem "minitest"

Gemfile.lock

@@ -231,7 +231,6 @@ DEPENDENCIES
   steep!
   tempfile
   test-unit
-  timeout
 
 BUNDLED WITH
   4.0.1

test/rbs/parser_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "timeout"
 
 class RBS::ParserTest < Test::Unit::TestCase
   def buffer(source)
@@ -1032,20 +1031,16 @@ class Foo[T < Integer] < Bar # Comment
 
   def test_invalid_position_range_raises
     # Regression: start_pos > end_pos used to cause an infinite loop in the lexer.
-    Timeout.timeout(5) do
-      assert_raises(ArgumentError) do
-        RBS::Parser._parse_signature(buffer(""), 1, 0)
-      end
+    assert_raises(ArgumentError) do
+      RBS::Parser._parse_signature(buffer(""), 1, 0)
     end
   end
 
   def test_invalid_byte_range_in_parse_type_raises
     # Regression: parse_type's byte_range: keyword reaches _parse_type directly,
     # which used to hang on reversed ranges.
-    Timeout.timeout(5) do
-      assert_raises(ArgumentError) do
-        RBS::Parser.parse_type("", byte_range: 1..0)
-      end
+    assert_raises(ArgumentError) do
+      RBS::Parser.parse_type("", byte_range: 1..0)
     end
   end
 end