Remove unrelated specs

spec/support/chunked_io/chunked_io_helpers.rb

-module ChunkedIOHelpers
-  def fill_trace_to_chunks(data)
-    stream = described_class.new(job_id, nil, 'a+b')
-    stream.write(data)
-    stream.close
-  end
-
-  def sample_trace_raw
-    # ChunkStore::Database doesn't support appending, so the test data size has to be least common multiple
-    if chunk_stores.first == Gitlab::Ci::Trace::ChunkedFile::ChunkStore::Database
-      '01234567' * 32 # 256 bytes
-    else
-      File.read(expand_fixture_path('trace/sample_trace'))
-    end
-  end
-
-  def set_smaller_buffer_size_than(file_size)
-    blocks = (file_size / 128)
-    new_size = (blocks / 2) * 128
-    allow_any_instance_of(described_class).to receive(:buffer_size).and_return(new_size)
-  end
-
-  def set_larger_buffer_size_than(file_size)
-    blocks = (file_size / 128)
-    new_size = (blocks * 2) * 128
-    allow_any_instance_of(described_class).to receive(:buffer_size).and_return(new_size)
-  end
-
-  def set_half_buffer_size_of(file_size)
-    allow_any_instance_of(described_class).to receive(:buffer_size).and_return(file_size / 2)
-  end
-end