Exclude .kt files from ignored return value query

Author: tamasvajk

java/ql/src/Likely Bugs/Statements/ReturnValueIgnored.ql

@@ -75,6 +75,7 @@ predicate isMustBeQualifierMockingMethod(Method m) {
 
 predicate relevantMethodCall(MethodAccess ma, Method m) {
   // For "return value ignored", all method calls are relevant.
+  not ma.getFile().isKotlinSourceFile() and
   ma.getMethod() = m and
   not m.getReturnType().hasName("void") and
   (not isMockingMethod(m) or isMustBeQualifierMockingMethod(m)) and

java/ql/test/kotlin/query-tests/ReturnValueIgnored/ReturnValueIgnored.expected

@@ -1 +0,0 @@
-| Test.kt:14:29:14:33 | foo(...) | The result of the call is ignored, but 90% of calls to foo use the return value. |