Remove show_linewise_tokens deprecated in 8.6

IPython/core/inputtransformer2.py

@@ -571,22 +571,6 def has_sunken_brackets(tokens: List[tokenize.TokenInfo]):
                 return True
     return False
 
-
-def show_linewise_tokens(s: str):
-    """For investigation and debugging"""
-    warnings.warn(
-        "show_linewise_tokens is deprecated since IPython 8.6",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-    if not s.endswith("\n"):
-        s += "\n"
-    lines = s.splitlines(keepends=True)
-    for line in make_tokens_by_line(lines):
-        print("Line -------")
-        for tokinfo in line:
-            print(" ", tokinfo)
-
 # Arbitrary limit to prevent getting stuck in infinite loops
 TRANSFORM_LOOP_LIMIT = 500