🔥 remove no-longer-necessary checks (pandas-dev#37138)

Author: MarcoGorelli

ci/code_checks.sh

@@ -180,14 +180,6 @@ 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"
-
-    MSG='Check for python2-style super usage' ; echo $MSG
-    invgrep -R --include="*.py" -E "super\(\w*, (self|cls)\)" pandas
-    RET=$(($RET + $?)) ; echo $MSG "DONE"
-
     MSG='Check for use of builtin filter function' ; echo $MSG
     invgrep -R --include="*.py" -P '(?<!def)[\(\s]filter\(' pandas
     RET=$(($RET + $?)) ; echo $MSG "DONE"
@@ -206,10 +198,6 @@ if [[ -z "$CHECK" || "$CHECK" == "patterns" ]]; then
     invgrep -R --include="*.py" --include="*.pyx" -E "(DEPRECATED|DEPRECATE|Deprecated)(:|,|\.)" pandas
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
-    MSG='Check for python2 new-style classes and for empty parentheses' ; echo $MSG
-    invgrep -R --include="*.py" --include="*.pyx" -E "class\s\S*\((object)?\):" pandas asv_bench/benchmarks scripts
-    RET=$(($RET + $?)) ; echo $MSG "DONE"
-
     MSG='Check for backticks incorrectly rendering because of missing spaces' ; echo $MSG
     invgrep -R --include="*.rst" -E "[a-zA-Z0-9]\`\`?[a-zA-Z0-9]" doc/source/
     RET=$(($RET + $?)) ; echo $MSG "DONE"
@@ -259,10 +247,6 @@ if [[ -z "$CHECK" || "$CHECK" == "patterns" ]]; then
     invgrep -R --include=*.{py,pyx} '\.__class__' pandas
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
-    MSG='Check for use of xrange instead of range' ; echo $MSG
-    invgrep -R --include=*.{py,pyx} 'xrange' pandas
-    RET=$(($RET + $?)) ; echo $MSG "DONE"
-
     MSG='Check that no file in the repo contains trailing whitespaces' ; echo $MSG
     INVGREP_APPEND=" <- trailing whitespaces found"
     invgrep -RI --exclude=\*.{svg,c,cpp,html,js} --exclude-dir=env "\s$" *