Revert "[llvm]Add a simple Telemetry framework" (#120769)

Reverts #102323 Reason: broke CI

Author: oontvoo

llvm/docs/Telemetry.rst

@@ -72,7 +72,6 @@ intermediate LLVM representation.
  SupportLibrary
  TableGen/index
  TableGenFundamentals
- Telemetry
  Vectorizers
  WritingAnLLVMPass
  WritingAnLLVMNewPMPass
@@ -294,6 +293,3 @@ Additional Topics
 
 :doc:`Sandbox IR <SandboxIR>`
  This document describes the design and usage of Sandbox IR, a transactional layer over LLVM IR.
-
-:doc:`Telemetry`
- This document describes the Telemetry framework in LLVM.