Deprecate USE_PROFILER from make/cmake.

[KellenSunderland]

Let's deprecate USE_PROFILER from cmake and build systems as this flag is now always on at compile time. Having this option seems to be confusing users. Doing a full removal from cmake should be safe, and should present users with an intuitive message. For other build systems we may need to provide a deprecation message.

[rahul003]

Yes, it's not used for make as well. It can be safely removed. The only usage of USE_PROFILER in the repo are in build scripts and documentation currently.

[apeforest]

@sandeep-krishnamurthy Please label this issue Build, Deprecated, Doc. Thx

[ChaiBapchya]

@KellenSunderland any update on this? Can we close this issue otherwise?

[KellenSunderland]

I think we still have to remove this option from our codebase right? I see a lot of documentation wrongly instructing users to set it to true for an example.