Revert "[trace] Introduce Hierarchical Trace Representation (HTR) and add command for Intel PT trace visualization"

This reverts commit aad17c5.

Breaks LLDB build on 32 bit Arm/Linux bot:
https://lab.llvm.org/buildbot/#/builders/17/builds/9497

Differential Revision: https://reviews.llvm.org/D105741

Author: omjavaid

lldb/docs/htr.rst

@@ -1,2 +1 @@
-add_subdirectory(common)
 add_subdirectory(ctf)