Remove unnecessary locks.

1. createAppData already obtains a lock,
2. rmdex is a thread-safe operation and can be done at any time. Caller has to make sure there is no race condition.

Bug: 201090222
Test: presubmit
Change-Id: I826108c0f5493cb767b3738338a0bea43a93151d
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index 39ef0b5..f35abda 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -637,7 +637,6 @@
         const std::vector<android::os::CreateAppDataArgs>& args,
         std::vector<android::os::CreateAppDataResult>* _aidl_return) {
     ENFORCE_UID(AID_SYSTEM);
-    std::lock_guard<std::recursive_mutex> lock(mLock);
 
     std::vector<android::os::CreateAppDataResult> results;
     for (const auto &arg : args) {
@@ -1627,7 +1626,6 @@
         const std::string& instructionSet) {
     ENFORCE_UID(AID_SYSTEM);
     CHECK_ARGUMENT_PATH(codePath);
-    std::lock_guard<std::recursive_mutex> lock(mLock);
 
     char dex_path[PKG_PATH_MAX];