changes according tó comments

Author: topper-123

ci/code_checks.sh

@@ -122,8 +122,8 @@ if [[ -z "$CHECK" || "$CHECK" == "patterns" ]]; then
     invgrep -r -E --include '*.py' 'pytest\.warns' pandas/tests/
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
-    MSG='Check for pytest raises without context' ; echo $MSG
-    invgrep -r -E --include '*.py' "[[:space:]] pytest.raises" pandas/tests/
+    MSG='Check for python2-style file encodings' ; echo $MSG
+    invgrep -R --include="*.py" -E "# -\*- coding: utf-8 -\*-" pandas scripts
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     # Check for the following code in testing: `np.testing` and `np.array_equal`

pandas/tests/tseries/offsets/__init__.py

@@ -1 +0,0 @@
-