Revert "Temporary apply LIBC version to __pthread_gettid"

This reverts commit eb90e91cb5872f6aac7008b0c83e103d396be196.

Change-Id: I63450087b6d3c23218b77d5eee37965f254a82d6
diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index 1f1cd42..4bbb2c1 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -344,9 +344,6 @@
   return pthread_gettid_np(t);
 }
 
-__asm__(".symver __pthread_gettid,__pthread_gettid@LIBC");
-__asm__(".symver __pthread_gettid,__pthread_gettid@@LIBC_PRIVATE");
-
 // Older versions of apportable used dlmalloc directly instead of malloc,
 // so export this compatibility shim that simply calls malloc.
 void* dlmalloc(size_t size) {