Revert D153927 "Resubmit with fix: [NFC] Refactor MBB hotness/coldness into...

Revert D153927 "Resubmit with fix: [NFC] Refactor MBB hotness/coldness into templated PSI functions."

This reverts commit 4d8cf2ae.

There is a library layering violation. LLVMAnalysis cannot depend on LLVMCodeGen.

```
llvm/include/llvm/Analysis/ProfileSummaryInfo.h:19:10: fatal error: 'llvm/CodeGen/MachineFunction.h' file not found
   19 | #include "llvm/CodeGen/MachineFunction.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```