Revert "Only spawn one binder thread for cmd."

This was being used as a work around for a static destructor
issue that has been fixed.

This reverts commit c21bc9afe403f52c189d2d6b79dedaf9dce6217b.
Bug: 36066697
Bug: 77934844
Test: cmd still works

Change-Id: Id13589c5c12de0a36b70b8d16216e21345eb986e
diff --git a/cmds/cmd/cmd.cpp b/cmds/cmd/cmd.cpp
index 48d5d4a..4238531 100644
--- a/cmds/cmd/cmd.cpp
+++ b/cmds/cmd/cmd.cpp
@@ -167,13 +167,6 @@
 {
     signal(SIGPIPE, SIG_IGN);
     sp<ProcessState> proc = ProcessState::self();
-    // setThreadPoolMaxThreadCount(0) actually tells the kernel it's
-    // not allowed to spawn any additional threads, but we still spawn
-    // a binder thread from userspace when we call startThreadPool().
-    // This is safe because we only have 2 callbacks, neither of which
-    // block.
-    // See b/36066697 for rationale
-    proc->setThreadPoolMaxThreadCount(0);
     proc->startThreadPool();
 
 #if DEBUG