~Memtrack: don't delete hw_module_t*

mModule here is from a dlsym from libhardware, so this was crashing
here, if hwservicemanager crashes.

Bug: N/A
Test: N/A
Change-Id: I42aa35df0eafd791465f6e099dc1945bd0f763ea
diff --git a/memtrack/1.0/default/Memtrack.cpp b/memtrack/1.0/default/Memtrack.cpp
index 33a6906..0bbf83d 100644
--- a/memtrack/1.0/default/Memtrack.cpp
+++ b/memtrack/1.0/default/Memtrack.cpp
@@ -34,9 +34,7 @@
         mModule->init(mModule);
 }
 
-Memtrack::~Memtrack() {
-    delete(mModule);
-}
+Memtrack::~Memtrack() {}
 
 Return<void> Memtrack::getMemory(int32_t pid, MemtrackType type,
         getMemory_cb _hidl_cb)  {