Revert D81682 "[PGO] Extend the value profile buckets for mem op sizes."

This reverts commit 4a539faf.

There is a __llvm_profile_instrument_range related crash in PGO-instrumented clang:

```
(gdb) bt
llvm::ConstantRange const&, llvm::APInt const&, unsigned int, bool) ()
llvm::ScalarEvolution::getRangeForAffineAR(llvm::SCEV const*, llvm::SCEV
const*, llvm::SCEV const*, unsigned int) ()
```

(The body of __llvm_profile_instrument_range is inlined, so we can only find__llvm_profile_instrument_target in the trace)

```
 23│    0x000055555dba0961 <+65>:    nopw   %cs:0x0(%rax,%rax,1)
 24│    0x000055555dba096b <+75>:    nopl   0x0(%rax,%rax,1)
 25│    0x000055555dba0970 <+80>:    mov    %rsi,%rbx
 26│    0x000055555dba0973 <+83>:    mov    0x8(%rsi),%rsi  # %rsi=-1 -> SIGSEGV
 27│    0x000055555dba0977 <+87>:    cmp    %r15,(%rbx)
 28│    0x000055555dba097a <+90>:    je     0x55555dba0a76 <__llvm_profile_instrument_target+342>
```