Remove reference to attribute group in test (#74816)

rdar://130759216

Author: ahatanaka

test/Interop/Cxx/class/closure-thunk-irgen.swift

@@ -43,7 +43,7 @@ public func testClosureToFuncPtrReturnNonTrivial() {
 
 // CHECK: define swiftcc { ptr, ptr } @"$s4main13returnFuncPtrySo10NonTrivialVcyF"()
 // CHECK: %[[V0:.*]] = call ptr @_Z8getFnPtrv()
-// CHECK: %[[V1:.*]] = call noalias ptr @swift_allocObject(ptr getelementptr inbounds (%{{.*}}, ptr @{{.*}}, i32 0, i32 2), i64 24, i64 7) #4
+// CHECK: %[[V1:.*]] = call noalias ptr @swift_allocObject(ptr getelementptr inbounds (%{{.*}}, ptr @{{.*}}, i32 0, i32 2), i64 24, i64 7)
 // CHECK: %[[V2:.*]] = getelementptr inbounds <{ %{{.*}}, ptr }>, ptr %[[V1]], i32 0, i32 1
 // CHECK: store ptr %[[V0]], ptr %[[V2]], align 8
 // CHECK: %[[V3:.*]] = insertvalue { ptr, ptr } { ptr @"$sSo10NonTrivialVIetCX_ABIegn_TRTA", ptr undef }, ptr %[[V1]], 1