refactor to use io.read_text

aider/utils.py

@@ -1,24 +1,6 @@
-from pathlib import Path
-
 from .dump import dump  # noqa: F401
 
 
-def quoted_file(fname, display_fname, fence=("```", "```"), number=False):
-    prompt = "\n"
-    prompt += display_fname
-    prompt += f"\n{fence[0]}\n"
-
-    file_content = Path(fname).read_text()
-    lines = file_content.splitlines()
-    for i, line in enumerate(lines, start=1):
-        if number:
-            prompt += f"{i:4d} "
-        prompt += line + "\n"
-
-    prompt += f"{fence[1]}\n"
-    return prompt
-
-
 def show_messages(messages, title=None, functions=None):
     if title:
         print(title.upper(), "*" * 50)