Kotlin: Remove unneeded pytest imports

Author: jketema

java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py

@@ -1,5 +1,4 @@
 import commands
-import pytest
 
 
 def test(codeql, java_full, kotlinc_2_3_20):

java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py

@@ -1,5 +1,4 @@
 import commands
-import pytest
 
 
 def test(codeql, java_full, kotlinc_2_3_20):