chore: remove style linter for windows line endings

Now that the Lean frontend normalises all line endings to LF (since leanprover/lean4#3903), this check is not necessary any more. It is also one fewer Python linter to rewrite in Lean.

scripts/lint-style.py

@@ -46,7 +46,6 @@
 ERR_IBY = 11 # isolated by
 ERR_DOT = 12 # isolated or low focusing dot
 ERR_SEM = 13 # the substring " ;"
-ERR_WIN = 14 # Windows line endings "\r\n"
 ERR_TWS = 15 # trailing whitespace
 ERR_CLN = 16 # line starts with a colon
 ERR_IND = 17 # second line not correctly indented
@@ -160,9 +159,6 @@ def line_endings_check(lines, path):
     errors = []
     newlines = []
     for line_nr, line in lines:
-        if "\r\n" in line:
-            errors += [(ERR_WIN, line_nr, path)]
-            line = line.replace("\r\n", "\n")
         if line.endswith(" \n"):
             errors += [(ERR_TWS, line_nr, path)]
             line = line.rstrip() + "\n"
@@ -385,8 +381,6 @@ def format_errors(errors):
             output_message(path, line_nr, "ERR_DOT", "Line is an isolated focusing dot or uses . instead of ·")
         if errno == ERR_SEM:
             output_message(path, line_nr, "ERR_SEM", "Line contains a space before a semicolon")
-        if errno == ERR_WIN:
-            output_message(path, line_nr, "ERR_WIN", "Windows line endings (\\r\\n) detected")
         if errno == ERR_TWS:
             output_message(path, line_nr, "ERR_TWS", "Trailing whitespace detected on line")
         if errno == ERR_CLN: