CLN: remove '# -*- coding: utf-8 -*-' pattern (#26197)

Author: topper-123

asv_bench/benchmarks/offset.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import warnings
 from datetime import datetime
 

ci/code_checks.sh

@@ -126,6 +126,10 @@ if [[ -z "$CHECK" || "$CHECK" == "patterns" ]]; then
     invgrep -r -E --include '*.py' "[[:space:]] pytest.raises" pandas/tests/
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
+    MSG='Check for python2-style file encodings' ; echo $MSG
+    invgrep -R --include="*.py" --include="*.pyx" -E "# -\*- coding: utf-8 -\*-" pandas scripts
+    RET=$(($RET + $?)) ; echo $MSG "DONE"
+
     # Check for the following code in testing: `np.testing` and `np.array_equal`
     MSG='Check for invalid testing' ; echo $MSG
     invgrep -r -E --include '*.py' --exclude testing.py '(numpy|np)(\.testing|\.array_equal)' pandas/tests/

doc/source/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # pandas documentation build configuration file, created by
 #

pandas/_libs/__init__.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # flake8: noqa
 
 from .tslibs import (

pandas/_libs/algos.pyx

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import cython
 from cython import Py_ssize_t
 

pandas/_libs/groupby.pyx

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import cython
 from cython import Py_ssize_t
 from cython cimport floating

pandas/_libs/hashing.pyx

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Translated from the reference implementation
 # at https://github.com/veorq/SipHash
 

pandas/_libs/hashtable.pyx

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 cimport cython
 
 from cpython cimport (PyObject, Py_INCREF,

pandas/_libs/index.pyx

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from datetime import datetime, timedelta, date
 
 import cython

pandas/_libs/indexing.pyx

@@ -1,6 +1,3 @@
-# -*- coding: utf-8 -*-
-
-
 cdef class _NDFrameIndexerBase:
     """
     A base class for _NDFrameIndexer for fast instantiation and attribute