feat: Remove pyhf.simplemodels.hepdata_like from API

[aryan26roy]

Description

Resolves #1658.
This PR removes pyhf.simplemodels.hepdata_like in src/simplemodels along with the test in tests/test_simplemodels for v0.7.0. It has been deprecated since v0.6.2.

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• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

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* Remove pyhf.simplemodels.hepdata_like from the codebase and docs
   - pyhf.simplemodels.hepdata_like has been deprecated since v0.6.2

[codecov]

Codecov Report

Merging #1670 (12828c4) into master (c3d0acb) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1670      +/-   ##
==========================================
- Coverage   98.07%   98.05%   -0.03%     
==========================================
  Files          64       64              
  Lines        4216     4213       -3     
  Branches      585      585              
==========================================
- Hits         4135     4131       -4     
- Misses         48       49       +1     
  Partials       33       33              

Flag	Coverage Δ
contrib	25.30% <ø> (-0.01%)	⬇️
doctest	61.07% <ø> (+0.01%)	⬆️
unittests	96.36% <ø> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pyhf/simplemodels.py	92.30% <ø> (-7.70%)	⬇️

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[lukasheinrich]

Thanks @aryan26roy

[matthewfeickert]

Note to future us: The coverage dip is because

pyhf/src/pyhf/simplemodels.py

Lines 144 to 154 in c3d0acb

	# Deprecated APIs
	def _deprecated_api_warning(
	deprecated_api, new_api, deprecated_release, remove_release
	):
	warn(
	f"{deprecated_api} is deprecated in favor of {new_api} as of pyhf v{deprecated_release} and will be removed in release {remove_release}."
	+ f" Please use {new_api}.",
	DeprecationWarning,
	stacklevel=3, # Raise to user level
	)

isn't being tested anymore. This is fine to leave in, but we might want to move it out into another module later.

[matthewfeickert]

LGTM. 👍 Thanks @aryan26roy!